First off all: Thanks for making a linux build. I think it did exactly what was intended.
Now, for feedback: The game is short, but it has potential, though maybe make it more clear if the end is intentional. Sound is nice and I liked how it looked. I also liked that I in theory had to move to dodge the attacks, however in my case I seemed to be lucky and I think the attacks from the slime would have missed me anyway if I stood still.