Doodads
Doodads are the small destructible props scattered through every level — torches, candles, pots, coral and their kin. Stomping one bounces you and recharges your Gunboots without ending your combo, which makes them the connective tissue of long chains. They drop a few gems when broken.
Doodads are usually drawn in the scenery colour (white in the default palette); the candles of the Catacombs and the underwater props of the Aquifer are the exceptions. In Limbo, floating doodads are the only things to bounce on at all.
In Boulder Style, walking into a doodad simply smashes it.