Ideas, anyone?

So lets see here: I've already written several songs for our game (the most recent one I just uploaded), and I'm starting to run out of ideas for songs. So, I'm curious of what you guys can come up with. Think of a video game, and then picture what kind of environments you would encounter. THEN, think about what music would accompany that.

I already have:
Desert
Factory
City
Pyramid
Dungeon
Cave
Snowy place
Classical place
Flying Fortress
Ship
Town
Field

Don't let that discourage you from suggesting something already here, just specify what aspects the song should have.