The melding of precision platforming with RETROWILL-style puzzles is an outstanding winning combo that i'm really loving. There is so much great polish and visual style in this one (sleep start state, death state, head smash, screen shake+freeze to name a few), but I especially love the animations!
I've cleared all the stages except the last green one, but it's giving me super meat boy "so you want to be the guy" flashbacks, so i'm going to step away and try later with a gamepad. Some of the collectables throughout the game I can't even begin to fathom how to obtain.