This is very difficult. Sure, you say it is difficult, and it's supposed to be, but the controls absolutely suck and you don't really add anything to the experience. You just throw the player in without a good explanation and just say: "Oh it's just difficult."
Is there a reason that a slime dies from spikes? Heck, is there a reason that a basement has spikes? Is there a reason as to why the slime is in the basement in the first place?
I'll go more in depth about the controls. They just suck. If you really want to add difficulty to the game, throw in something else; puzzles, elements, etc.
Although this game does has potential, and was actually enjoyable for some time, it quickly gets stale.