i have not played this game for long, so consider correcting me (if it's possible on this site?)

List of things that in my opinion need changes:
-configuration has input controls for first person shooter, i recommend adding meaningful options such as ability to bind key to each type of tile
-intro screen could use more polish:
-the name is rather blurry, possibly create a font (or scalable vector graphics) so that it stays sharp when scaled like the logo of a company,
because this can be alot of work you could also just use a larger image with more detail
-i can see the end of the water in the corners (1920x1080)
also when playing a game: prevent user from panning the camera where the water stops
-consider adding a label next to 'low medium hard' that says 'difficulty'
-UI:
-consider adding labels or tooltips when hoverering that give the name of the tyle type
-when completing a game, the quit game option doesn't work, when you press 'new game' after you have pressed 'quit game'
it then asks you whether you want to quit game.
-when completing a game, you should have the option to go back to the main menu
-when completing a game, you should be able to choose a difficulty when selecting 'new game', or just replace 'new game' with all the difficulties (again add label)
-when completing a game that you failed 'plants died', the 'new game' option doesn't work, after pressing it twice, you go back to main menu
-hide the menu button when playing (in for example pause menu)
-allow us to rotate the board AND to change the viewing angle (top-down to a very low angle), when doing this, you will need to add some type of skybox, and hide the edges of the water
-allow surrender (generate new level with same difficulty)
-choosing a difficulty on the main menu after having played a game should generate a new game instead of using the previous game of that difficulty
-tutorial:
-consider adding a robust tutorial, because a game based on mechanics needs to be explained
-explain the term 'entropy', this does not need to go in great detail, consider incorporating this in the tutorial (at the beginning)
-what plants/plant type are we protecting?
-explain the mechanics for each type of tile
-difficulty (note: i am speaking from inexperience with this game)
-low seems inconsistent, sometimes giving me 1 type of tile and a very very easy objective, other times giving me 4 types of tiles
-instead of only difficulties, consider using parameters that the player can set to generate a level: 'number of tile types', 'board size', 'difficulty', 'enable <

comment got cut off

-instead of only difficulties, consider using parameters that the player can set to generate a level: 'number of tile types', 'board size', 'difficulty',
'enable <> (example disable flagposts), etc.
-can't say alot more since i have next to know deep knowledge of the game since there is no tutorial
-sound effects
-music is okay, consider adding more (choose Creative Commons music), wil get stale
-sound effects for each tile are too loud for my taste, and i think they wil get stale very fast, for possible solution see next point
-add volume sliders (music, sound effects)
-cloud effect is bad, it is loud when a cloud is created, and then fades out, consider having a constant sound of wind with volume slightly increasing depending on amount of clouds
-changes in tiles that are done indirectly (for example fire spreading) should also have a sound

i think these changes would do alot to improve the game

Hello, this is my honest opinion, textwall ahead, consider reading tldr at bottom instead

note: - = 1st level of list, + = second level of list, eg: types of games: , % = third level
-fps, examples:
+cod
+csgo
-moba, examples:
+dota

What does PopSwap have to do with the concept? What does Popping elements from a stack and Swapping element in an array have to do with this game?
Unless you intended another meaning?

mechanics:
-correct me if i'm wrong but the amount of tiles you jump is randomly generated between 'minrange' and 'maxrange'?
this is okay but too large a jump and you can't see the tiles anymore

graphics:
-perspective is really weird for me, it's difficult for me to process where the animal is located
-low quality models, low quality background (clouds look like an image upscaled 4 times and looks like it was drawn in 10 minutes)
-i would honestly make the game 2D: better visibility, easier creation of models, currently the 3D adds next to nothing
-the color palette might be improved, but the idea behind it is good, have high contrast between objects that matter (the sky, and the tiles in background and foreground)

concept: i honestly think the concept is bad to begin with, the animals could be replaced with anything else, in concept they are just balls bouncing on alternating tiles.
How you go about improving this game depends in which direction you want to go:

-go towards your original concept (preventing animals from plummeting to their death): come up with new mechanics that work well with your concept and go less to the abstract,
altough i feel this is not the way you want to go, because the current mechanics have almost nothing to do with plummeting to death and nothing that is unique to animals

-go more towards the abstract side of current implementation (ball bouncing on tiles):
i think this is the way to go for you, ditch the animals, stick with the 'control the environment',
and now i'm going to try to give you some ideas about how you could change the mechanics,
i'm keeping the mechanic that every wall (=rotated line) is in one of two groups that can be made collidable with the press of the button:

+allow for more walls and let them be generated everywhere and with any slope/rotation and length, this allows:
%alternative to 'jump random number', now the ball can have varying directions (bouncing off walls)
%the player can take advantage of slopes that are angled a certain way to better control the ball
altough make sure that there is enough distance between the walls, and that they don't overlap
+give different walls different properties when colliding, examples of different properties (when colliding):
%give/take velocity (xVelocity and yVelocity): have reasonable limits on the amount of velocity given/taken (ball needs to have its own velocity)
%'does not collide when ball comes from bottom': the 'bottom' should be determined by the angle of the wall (only applies when you implement rotated walls)
%teleport ball
%lower/increase gravity (possibly for a certain duration)
%and so on
+note: this idea requires the ball to have it's own velocity, to prevent the player the player from gaining to much speed, implement negative returns,
the faster the ball goes, the faster it loses speed, this makes it hard to go too fast and break the game.
Also recommended to increase the balls velocity on every collision with a wall

general things you should look out for/do:
-make sure there is enough of the level on the screen
-choose between fixed levels (easier to have wel designed levels) and randomly generated levels
-implement one thing at a time, and slowly add features
-for backgrounds, models: choose a model that fits with your theme of the game or choose to have an abstract model (for example a clear blackground, the ball is just a ball)
-when you bounce the rainbow takes an awkward turn, consider hiding the turn by showing something in front (like a pot of gold or something else that signifies a bounce)

tldr (what i find most important);
-make game 2D
-revise concept, consider going abstract:
+add rotated walls
+give the ball its own velocity
+add properties when colliding

feel free to ask me any questions

'You are right about the random generation of tiles and i have been balancing the jump range but i feel the game needs to get harder and harder. So this is a hard balance to reach. '
i suggest using a value to represent difficulty, calculate this value in function of distance travelled, have different functions for different difficulty levels.
example:
easy: difficulty = log(distanceTravelled)
normal: difficulty = log(distanceTravelled) + 1
hard: difficulty = 1.2 * log(distanceTravelled) + 2
Use this difficulty value to generate tiles (amount of tiles, types of tiles,...)

'Graphically and mechanically PopSwap is intended to be a casual game aimed at younger children and casual gamers essentially a mobile game intended for time wasting and competing with friends E.G. Crossy Road or Flappy Bird. So graphically I intended it to be a cutesy casual game with little animals that bounce on colourful blocks in the sky (background was done quickly) but the models were bought and i think they would work in a cutesy game '
I think we come to an important issue: feedback and time.
time: The time you are in the air on average increases with the difficulty like it's now implemented, the player can only make a decision that matters every
x seconds, i can feel this very getting boring the further you are.
Flappy Bird is fast, and has the player making important decisions throughout (how many times to flap)
Crossy Road allows the player to decide and run at their own pace (altough there is a speed limit for the animals and the obstacles must align)

feedback: when the animal is in the air and the tiles are invisible, there is no feedback, very bad, especially on mobile devices (did it register my tap?)
consider limiting the arc of a player so that the highest arc still allows the player to view the tiles completely (vertically)


'I think the 3D adds to the popping and swapping of the tiles and i don't see this working in 2D, correct me if i'm wrong. '
i does add, but i think you need to experiment with the perspective, it just feels a bit off
to make this work in 2D: the tiles that are popped out are their normal colors, the tiles that are popped in are greyed out/have less color/other.

'The mechanics i think need tweaking and i like the ideas for different platforms you had like the gravity change and teleporters.'
Also consider varying the length of the tiles.

'I know very little about colour palettes and theory i just wanted colours that matched and were appealing in a nice casual game. I have struggled trying to find an art style but i think the characters work but the BG and the platforms need changing.'
keep it simple, i don't know what artstyle you could go for, maybe change the tiles and background depending on distance travelled:
-night/day
-type of tileset (=how the tiles look, texture of tiles or model of tiles) like buildings, clouds, treetops, bouncing on the roofs of driving cars (that are driving at the same speed so that the tiles stay in the same place, popping and swapping makes cars change lane with 2 lanes), ...

'But the game is essentially a timing game so i cant have too much of the level on screen at the moment random levels seem to be the way to go currently RNG decides if the platform is a double then if its green or red. then a second query makes sure they alternate.'
i agree on generating levels with RNG, but not jump range
also why a second query? don't randomly decide if the color is red or green, just use the opposite color of the previous tile(s)
Also consider allowing more than 2 of the same color of tile:
1. choose random number between 1 and maxTilesOfSameColor, generate that many tiles with color X
2. repeat 1 but with the alternate color

Also something else:
the animals always rotate counterclockwise and only roll, consider 'simulating' wind resistance on the polygons of the animals that are sticking out.
How to do this:
-give every animal a yawChange, pitchChange, rollChange value
-when an animal travels a distance, the new value of the yaw, pitch and roll of the animals becomes: x = (x + change*distanceTravelled) % 360
eg: yaw = (yaw + yawChange * distanceTravelled) % 360
keep in mind that the yaw, roll and pitch should wrap around thus we use mod (%),
note that you should replace the value '360' with 2*Pi if your math functions use radians
distanceTravelled = difference in x values between current location of animal and previous location

Also consider using different tile lengths

feel free to ask any questions.

v0.4: when i start the game, i can see the island as in the screenshot, the clouds and grass moves, but i am unable to do anything,
i tried almost every key, tried clicking everywhere, the 4 characters just stand in their 4 spots and don't move.
I tried different settings but it didn't help.

i would like a direction on how to start the game, or open the main menu, or do anything really.

Did you upload the wrong version?