Amazing entry! Since Tricky Keys last year, I always looking forward to your games!
It's crazy how many mechanics you packed in, almost introducing a new mechanic each level for the first 2 worlds but somehow not being totally overwhelming. The level design is stellar and there's a balanced mix of aha-moment style puzzles and action based challenges.
It's also incredibly well polished; the graphics and animations are stylish and fluid and the soundtrack is catchy and fits the game really well!
The only minor thing I noticed was that I could cheese level 3-4 (Among the Dead) slightly: you can slide yourself over to the bottom right and activate the switch. The fact that purple ghosts keep switch blocks from closing allows you to use the magnet player on top to finish the level, by-passing a number of gameplay elements on the left.