Good game jam entry! Congrats on your first GWJ and welcome :)
Didn't read the instructions until I had killed 60 mutants and realized I had to upgrade my character manually. Cool take on a game and I really appreciated the tweening of the bars at the bottom, it was satisfying to look at
I like the risk vs reward but it didn't feel great to kill a bunch of mutants and spend currency just to reduce my own stats if I tried to upgrade too early / got unlucky :(