Hey there, thanks for trying out my game! You are right that the game is lacking on that front and that is mainly due to lacking the time to polish it to completion. Originally I was thinking of giving the player the option to select an upgrade at the end of each that would influence the rest of the run (such as new powers/attack ability, shortcuts, new enemy placements and so on), but sadly it didn't pan out. In any case, your feedback is appreciated! :)