The basis gameplay is a good idea, but I think jump charge is too long and it removes nervosity of the game but we can feel the power of the jump ! Moreover, I don't know if you wanted to do that with rock but when I walked on it,the rabbit slides. It's cause the same when he respawnes after so I had to restart from the beginning (it is nice to put checkpoints !). I think for futur improvements you can add some effect or indication to help player for landing . Nevertheless it's a good job ! :)