Find a switch that opens a door somewhere in the level that has a switch inside that opens a door somewhere in the level that has a switch inside that opens a door somewhere in the level. Also every time you hit a switch 4 monster closets open, one of which will be directly behind you.

Dude why the big guy the final boss, those skeletons are way scarier.

The power went out when I was playing and my mid-mission autosave got corrupted so I had to restart the chapter, and I went 'ah hell yeah' because I got to play the first half of Cause and Effect again.

As a proof of concept: Concept Proven. The movement is extremely fluid, the only thing I would change is a bit more speed maybe. But yeah, I would definitely slap down some bones for a full game of this.

Plus the built-in rocket jump seal of approval.