I got quite motion sick, which is not normal for me and first person games. I think it was the screen tilting and the slow walk cycle, not sure.
I got 21 kills and made it to the 3rd wave playing as the ninja. This is quite an impressive amount of content for 3 days, you (guys?) should be proud. That being said it was kind of frustrating, the attack animation took forever and it wasn't clear when the enemy damage started/ended, for blocking.
I tried the geek and died immediately, since his attack takes 4 times longer then the enemies and does no damage. Maybe with a team to gather coins he'd be effective.
With the warrior I made it to wave 4, mostly because I discovered you can block and hit at the same time. Getting 3 kills with 1 hit was quite satisfying.
Overall an impressive entry but one that tries to achieve a lot for a 3 day project, and as such the gameplay feels unbalanced and poor. High marks for innovation, low for fun.