try watching a run

It's mostly 2.5D but has 3D sections here and there that serve as transitions to the 2.5D parts. (with the exception of two endgame stages that are completely 3D) To be honest, there are way better 2D/2.5D platformers out there, but I wouldn't write Forces off without at least giving it a shot. I know there are some better platformers out there but personally I can't put down Forces! So, basically, try it. You might like some parts of it.