I love to see 3D platformers! I also completed the game after I think 4 or 5 crystals on accident. The dark environment and the master passing away gave off a darker tone. I'm convinced that I helped revive some terrible monster o.O It did seem to uphold its end of the bargain and helped me out of the cave!
Adding a mouse sensitivity setting would be nice. But, I totally get that we are all time constrained.