This game is an absolute bastard. The overall difficulty needed to complete a level especially on the later half is pretty unprecedented for the time. It really pushes all of it's platforming mechanics to their limit regarding player involvement. For that, I have a lot of respect for it, but locking out the final level behind getting every collectible, AND having a fair deal of those collectibles be tied to activate hidden triggers to even spawn the damn things is a step too far. Combine that with an extremely archaic lives/continue/save system that doesn't mesh at all makes for a really frustrating experience, but one I can't completely condemn. The ending kinda sucks though, both the cutscene and the fact you don't actually fight Mr. Dark himself. I mean seriously what the fuck!