The character is floaty and slow. The camera is static and it's difficult to see ahead of you. There is no use for the attack besides activating the switches. As for crashes, you have to test the game outside of the editor and let others play. The developer himself is usually a very bad tester.
The art is nice, one of the best artstyles I have seen in this jam so far, but this jam was about gamedesign, not visual art design.