I really dig the game idea and how it was actually a bit challenging in the later stages :P
Although i do think it would be really cool if the stages had a connection to each other, like some of them have buttons but then pressed they do nothing on the current stage but actually on the next one, like opening doors or maybe activating / deactivating traps! :D
Maybe one scenario being that one stage the slime is trapped in a death room with lots of traps to dodge while the other stage has the button to let it out.
Other than that, Great work slime buddy! ;D