The concept is good. That was a challenge to follow 5 themes and the 1-bit restriction.
The intro is really nice, very original idea. The UI is complete, there is even an online Leaderboard.
I liked the music and SFX.
The gameplay idea was good, but the implementation wasn't fun enough : it was almost impossible to die, especially after wave 30. It needs a real goal for the player, and it should be much more challenging.
I also experienced lag around waves 15-20. I sadly haven't found the Easter Egg.
Good work !