The game make me laugh, I think is the most original gameover screen I seen !
When I play the game the first time I immediately close the game because the music was to loud..
On my second try I don't use the left mouse button. I was thinking it will restart the game, so I only dodge the first enemy for 2 minutes maybe more, before I understand I can shoot it.
I go through the the wave 5 I think.
You should improve the tutorial, and reduce the difficulty (reduce the life of the enemy !) and add more power up !
And your cheat code don't work for me ^^