alright fuckos today we be fuckin' round with possibilities
REMIX LEVELS (a la rhythm heaven)
Remix levels should be easy enough to make, just make a normal level like you would, but then change gamemodes by using either room_goto(gamemode) or a chain of instance_create()s, and then just adapt your level design process to that next gamemode.
CAMERA SIZE CHANGING, POSITIONING
well this'll be easy. make a view about the size of your current screen, viewport also being that size, enable it, and just change the view_wview and view_hview variables (probably on a scale). and also moving view_xview and view_yview can change camera position.
LEAVE MORE IDEAS IN THE REPLIES. THESE SHOULD BE POSSIBLE.
Yeah, here's my signature. I guess I could fill this up with self-promotion...
I have thought about that remix thing once a while ago.
I recently also tried implementing D3D in the background, but spent 2 minutes trying to somehow make it work and just gave up.
Still want to try that kind of hybrid radio/live level thing, but thinking into it, wouldn't work really with the whole audio thing and maybe the code, so it'd have to be like an actual SHOUTcast or something or send ogg buffers out one by one to be in sync with the game.