I love the cute graphcis of the game. The artstyle is really good! Also I like the different levels with increasing diffculty. But I have to say: the game feels too often unfair. Let me explain.
It startet with the tomatoes. Sometimes they caught me and I lost 2-3 lifes because within about 1s. But the cheese was horrible (I didn't manage to beat him). The hitboxes are way to big (for the cheese and its projectiles).
On the other side I could also see some nice details. I really like that the cheese gives some feedback before casting any attack. This is really helpfull while jumping on his head.
Also you did a really good job on the levels.
One last thing: I would prefer to have [SPACE] for attacking instead of [X].
So overall: adjust the hitboxes and this is really good game :-)