-Fun graphics, reminds me of some doodle-guy games from the flash era.
-Beat tutorial, seems on the simple side but it's solid. The one thing I don't care for is a jump boost from shape shift mid jump, especially since such a maneuver requires using mana.
-Time it takes from pressing x to actually going through the door is too long, it should immediately start fading to black.
-The precision to jump on the ghost, and the spider to a lesser extent, feels annoying to hit consistently.
-Cat has 1 HP out of 3 always? I feel like it shouldn't have empty hearts if it never has more than one. That reminds me, there was an HP pickup, but only one time and it was out of the way to get. Seems kind of odd, why is it even there when the main thing that kills you is using all mana?
-Beat game, simple but fun. Keep up the good work.