An entertaining game! The jumping is tight and work how you'd expect, which is always a must-have for challenge platformers like this, and the idea of a character with innately slippery ground controls as an intentional mechanic is a novel and interesting concept.
That said, while I appreciate the creativity of the character's intentionally slippery traits, it feels like the level design assumes that no such factor is in play. The prevalence of tiny platforms and restricted space oftentimes forces the player to painstakingly investigate the absolute minimum amount of momentum required for each individual jump in an attempt to avoid any possible slippage, rather than challenging the player to develop an instinct for the slipping in order to account for it in their running & jumping. In other words, it often becomes less of a matter of getting good at the game and more of a matter of trial & error and luck.
Overall, I rate the game 3.7/5, but since Itch doesn't let you give partial stars - and since the author is cool - it gets a 4 ^^