This is a really great puzzle game, I loved the sound effects and the visual style! Making sushi is a super cute idea too.
The only real problem this game has for me is it's very difficult to tell which direction the conveyor belts are moving. I think they only have two frames of animation so it's very ambiguous, I was wrong about half the time. I would adjust them so they have 3 or 4 frames of animation, and the detail is clearly going from one side to the other.
Awesome job!