First of all: thank you very much for playing my game and the critique. Yeah: the unkillilable enemies are a very annoying (and as I found out dumb) bug. Sorry for that.
With future updates I definitely plan on making the apocalypse a bit more cryptic and cozy. For the buffs: they are worth it for the boss, but I do an exceptionally bad job at explaining them: Angle = Movespeed Buff, Flexing Muscle Thing = Attack Damage Buff, Lightning thing: Attack Speed buff.
In future projects I would like to explore the idea of the Chungus starting as a small Baby-Chungy which grows as being fed, unlocking new abilities. Maybe there are even more of them to find in the game world? We will see.
Reading through all the comments I do get: carrying items must be fun in a future iteration: some how.
Thanks for playing. It always makes me happy, reading that people think my game(s) is/are fun.