tSR Compo Vol. 9: Enviromental Hazard

[NICKtendo DS]

When you say "assets," do you mean objects that the player actively interacts with, such as platforms and barrels and the like,
Or does this include scenery objects as well? Objects that go behind the player that have no function excepting ambiance would
kind of be "background," would they not? I guess what I'm asking is, what layer of tiles are we working on here, foreground useage
tiles, or back detail layer tiles?

This distinction is important for me, as most of everything I've made so far is foreground tiles.

Both. As long as it's placable in an enviroment. Background assets aren't the background itself, if that makes any sense. They form a background, like cloud and mountain tiles in Super Mario Bros.
What I classify as a background here are screen-sized pixel-arts and the like.