This feels like it could have been a real flash game. Very well done!
The progression of mechanics feels natural and is introduced gradually. One thing about the tutorialization is that the two click jump sign room introduces something which is not nessecary for the rest of the game (I think). It did however allow me to do some trick jumps which I don’t think are intended to skip frustrating parts of the game lol.
The music was nice and reminded me of the coconut song and under the sea. Fun song! xD
In general I think the length was very appropritate because I don’t think I would have wanted to play more 1) because I felt like anything more with these mechanics would become unfun levels of frustrating/difficult and 2) Because then I would have become sick of the song I enjoyed listening to for this experience hahaha.
You game page looks very clean too! In general the art direction is on point.