Hi ! It's good for a first jam, nicely done ^^ Neat gameplay, your code works well, the levels are fun to play (but sometimes we fall too much because the platforms are very small and if you jump with direction keys pressed you slip, it upset me at some point hahah).
Agreeing with a previous comment: for the lore you should have made a soap-character XD And yeah, music and some SFX effect (for instance, one sound when we're running, one sound for the jump) would improve your game a lot.