I liked the mix of platforming and puzzles a lot, and I thought the puzzles were really well designed. Solid tutorial too :D
I personally would prefer tighter controls for this sort of game tho (higher friction and faster acceleration), since the platforming and puzzles are already fun without the added challenge of sliding around. It was a fun game regardless though!
I think the game was well-designed visually too, the colour-coding of the barriers and enemies made everything very clear. Plus I prefer the minimal blocky style to asset packs.