awesome game ! really cool visual style, the gameplay is well explained and easy enough to grasp but still engaging and challenging, every move through a door is like a little gamble, quite suspenseful.
if you'd like constructive feedback, maybe the sound effect for collecting green orbs is a little out of place? perhaps a kind of synthesised twinkle / power up sound would fit the theme, but this is a very very minor criticism. your game is really well executed, great job :)