I really liked the spin on the formula (pun intended) by introducing the freeze button! It's a great concept with a lot of great platforming and puzzle potential!
Ran into a couple bugs while playing though - if you freeze the game while over the flag, you can beat a level without touching the ground. I also had a ghost clip through the side of a horizontal platform and kill me xD
Other than that though, this was really fun to play and a solid concept all around ^^