Thanks for the feedback!
Currently the player speed/acceleration, jump height and amount of air-jumps increase linearly (I just add a fixed value to the base value) so it scales very bad, but I thought I could get away with it in this jam ;)
For an updated version I'll implement some fancy logarithm that limits the effectivity of later deaths, preventing "ultra-jumps" but I have to learn the math behind logarithms first...