The art and the characters are truly great! The shark was my favorite. :D I managed to complete round 17 before it ended. :)
I think that the biggest issue is that there's not very much tactic or decisioning involved for me as a player and it pretty quickly came down to clicking a slice and then just look at it spinning before I got to chose a new item.
But the idea is really there! I think it would be really fun if there were something more for the players to do. To build the wheel during the game is really fun conceptually. :)
Your top area is the visuals! Good work! :D