Thanks all for playing our game! I apologize for not responding earlier, I left for a long vacation right after submitting the game.
@qzqxq - Yeah, we didn't have enough time to tune the health cost and the upgrades, most of which are really OP, but we felt like it was fine for a jam game, just to let people have fun with them :) When tuning the game, we wanted people to complete it after buying an upgrade or two, so dying at least once is expected and by design :) All issues you've mentioned I absolutely agree on - thanks a lot for the feedback!
@kuro - Thanks for playing! :) I agree that the game does lack polish - we didn't have enough time as most of it was consumed by implementing all of the upgrades and making sure they fit well together. I also agree about the pointlessness - initially we wanted the end to have more meaning, but again failed due to time constraints.
Both of you mentioned levels - good idea :) A game called Amorphous was our primary source of inspiration, but it's a single-level game so we mostly copied that approach. I can definitely agree however that if the system was reworked to have a levels progression, it could have been really fun.