This is some outstanding work, my friend. You made a game with a fantastic visual effect and interesting gameplay. The physics and looks along really make this game stand out. I only have one minor complaint: Roll Roll Pirate gets a little too fast too quickly. It occasionally makes him frustrating to handle, especially in situations which require smoother movements. All I could ask is that you slow his top speed down a little and I feel it will make the game more friendly to other players.
Dont' get me wrong though, this is an excellent piece of work here! I'm only suggesting a slight tweak. If you continue this as a series, it would be really cool to see Roll Roll Pirate start jumping.