This game is a great one!
I have to agree with Ravernt about the switch control.
I would also add that the platform where we should end the level you have any effect to catch the player’s eye and trigger the idea that it’s the goal of the level. (Maybe a pulse light?)
The UI design is pretty basic but it works.
And I would like to suggest adding some time of effect like bubbles getting out of the player in order to liven up a little the gameplay.
Overall this game has a great potential. Congratulations! Keep working!