The Pause takes too long. It's OK I suppose since pausing won't happen that often, but it's still quite irritating to have to wait for the animation to complete before resuming.
The game starts to go a little wild from level 4. You need to smooth out the errors and collisions, it's all a little erratic, with damage happening without collisions and the stage and background skipping. Enemies and carrots appearing and vanishing at random.
But, I like that game. It's fun.