An all-around excellent hack. How everything links together is very ingenious and the use of ZM and Fusion assets along with what look like original assets creates a very unique feel. Being able to finish the game in so many ways is impressive, and along with the NG+ adds a ton of replay.
One criticism I have is that there are a lot of one-way barriers for much of the game, basically up until PBs. Coupled with the relative scarcity of energy tanks, this makes it easy to feel underpowered and trapped.