I liked this a lot, you've managed to make players feel slick without requiring too much from the player themselves and I think that's a really good achievement. It's a combination of well designed levels with good clarity and simple well executed mechanics, you also left us all wanting more haha
It'd be even better if there was some more originality or incentive for the player to get to the end beyond completing the game. Again I really liked how solid this feels for almost any platformer player, that was my original goal when hearing "slick" was the theme but towing that line between making most people feel like they're slick and the game being too hard is really tough, especially in the context of a game-jam where playtesting is going to be very limited, well done!