Good but kind of easy.
Here are a few suggestions:
1. Add some music to this game.
2. Add a ton of different enemies and bosses, some that are not able to be eaten. (All of the enemies in this game are able to be eaten).
3. Make the game much much longer. At the end of level 3 it gave me a game over sign.
Here are some things I liked:
1. The background was really nice looking and fitting to the levels.
2. This game is very original. It's almost like Pacman gone 2D platmorer
Overall: Really good job on this game and I hope you deside to update and improve it.