Man, they sure would work in a game.
Tiny, ball-like pests practically found everywhere that you can pick up & throw or kick around which results in different effects depending on their type/element.
Or the could act as minions, like in Overlord. o.O
Add some grotesque sound effects when you use them to make it even better. xD
Also you can eat them for special buffs, too.
The green one gets ya stoned for sure, so you can see invisible spiritual monsters. xxD