I found it surprisingly hard even with the simple mechanics, but it made me want to beat it and memorized the behaviour of certain areas. Good job for this!
As mentioned below, sometimes the jumping is wonky and could get frustrating. Especially when you try for the 50th time and then die because you slide down an edge (i guess such is the life of a slime). Checkpoints would've made it less frustrating but in the end it was a rewarding challenge to get everything right in one run. Weird to have no outro after having an intro but good job nontheless.