I would like to say for one that the puzzles are nice and hard for this. At the same time, the fact that you can't control when you are wall sliding and when you aren't is a bit counter-intuitive to how things are normally done in games. When I am stuck sliding against a wall while mashing the opposite direction to try to step off, it doesn't feel right.
As for the true test of sanity? It is given to us by Dennis Keitel. The only song in the game has nearly got me on a mission to hunt him down. More music to choose from please!