The only criticisms I can say are:
1. the music is a little repetitive
2. some reason I get a huge lag spike whenever I die
3. it's too good. I just wish it were a little longer...
Absolutely everything else is perfect, from the sounds, the effects, the artstyle, the gameplay, and so on. I really, really like this incredibly fun and creative game. And it was made in 3 DAYS?!?!?