Not bad for a first game on Itch.io. I like the plan to have the game be hard, but I feel like the controls are a little too unresponsive. There's a balance you have to achieve when making these rage games and I feel like this leans a little too much into the unfun side. I think increasing the player's friction and making his hitbox smaller would improve it in that aspect (maybe it's explained by the character wearing slippery soap shoes?)
It would also be a little more interesting with obstacles to place difficulty not only on platforming but trying to avoid things.