The idea is nice of frozen clouds. I liked the vibe, a little cartoony. Gameplay could be improved by making a slider for mouse sensitivity (think my mouse over-reacted?). Also you might consider an invisble box for the jumping mechanism, that is slightly larger than the current physical object. This gives poorly skilled players (like me) the advantage of making the jump even after the last moment (seems like a capsule in the shadow?). I did not get past the island after the first tube after about 10 tries. Overall, excellent for the short duration of the jam.