Really not much fun. Rather than moving the car up the screen when you accelerate, making it impossible to avoid other traffic, scroll the screen faster. Would make for a much better game.
Sudoku is a game of pure logic where the (normally elegant) solution can be derived without guess work.
Soluku is none of the above. Wiki Sudoku for tips on creating puzzles.
Really nice game. One problem, the rotation of the eyes seems random. I had one level where two bacteria were exactly in sync, which meant they could never join.
The physics seem way off. The ball seems to change bounce angle randomly. It also goes through some bricks, doesn't bounce off others and even gets stuck in the paddle.