Very neat game! I was personally a little confused with the upgrade system. Also, I wasn't sure what the enemy bullets did to be me due to the lack of visual/auditory feedback.  With some tuning here and there, I think it can be a very fun game!

Nice little game! you should make the tutorial mandatory, because I had no idea what the hell was happening the first half of the run.  I like the upgrade system as well. Good job!

Fun game, and the upgrade system was nice! We didn't realise you could upgrade at first though, maybe it should pop up at the beginning of the game, since you start with some points to use?

Controls are ok, but the lack of animations makes the controls feel rigid. It would had been great to require the use mutations to pass through adversity, because actually this is not mandatory. Though Graphics are ok, and it's a decent platformer. Well done.