Creative idea and mechanics! I found it really challenging at first because of all the threats to track, but it was fun once I got used to the controls. I agree with the others that starting easy and adding more dangers would help. I think adding a warning to the lilypads about to sink would also be a nice signal to the player, similar to how the fish animation works right before they jump.
I managed to get a high score of 18 :) Nice work!