Hey! I played your game!
It was a very enjoyable experience. The music fit the setting very well and the gameplay was fun.
I think that the difficulty for the first 3 waves was at a good level, however I feel that the boss wave was a tad easy.
Some of the collision was a little rough, so it would sometimes kill the momentum when rolling around (the gap between the water and the rocks that border the water looks like I should be able to fit, but I can't).
Very great job though!