Great game! Good job and well executed mechanics. There is a soft lock bug on the ice that others have mentioned. There is also that graphical glitch people mentioned. This can happen if your pixels per tilemap is not the same as you pixel per sprite in the spritesheet.
The last level got a bit stale with the labyrinth since the character kept catching on corners which inhibits movement. Maybe changing the character collider from box to circle would help by letting it slide around corners.