Figured out what I'm going to make; a resource-management/sim game taking place on a very small planet where space debris is a very real issue! The more unbalanced your planet gets, the more wildly it spins, and asteroids might hit your buildings and damage them (thus causing them to lose durability, and cost resources to repair). The damage is proportional to how fast the collision is.

Currently working on some really crappy art assets for a prototyping phase - depending on time, might have an artist friend help out with making things look good, but probably not.