Very good use of the assets. The portal at the end of the stage is awesome. The music was cool. The sound effects were really juicy :D Too bad that the game crashed when selected an upgrade at the end of a stage. But I've played enough to give you some points that I think could be improved:
- The movement felt a bit too slidy for me. It's better than having just a constant velocity for sure but that was a bit too much for my liking
- Screenshake is a very handy tool to get that extra juice for your attacks. But it's a tool that should be handled with care. So I would advise to tone that down a bit
- I think it would be better if the items would have some kind of a description. I mean the bomb is pretty self explanatory but the potion not so
Nonetheless cool entry and good job. Had fun! :)