Flash Game: "Mindscape" - If you're really baked, play this. Direct (full screen) .swf link inside.

Just played through it, really cool stuff.

Cross-posted from r/webgames, credit to Hypersapien for the original submission.

Full Screen .swf

EDIT: I just started playing this when I posted it. Now that I've played it more, I realize there is one fundamental flaw that frustrates me. The camera won't let the character go upside-down. To me, left and right should always be consistently mapped to the same directions in the game world. Still a pretty good game though.