This is the fun that can be had in the amazing world of Microbia.
It's a persistent world, any changes you make to your world will change the world for everyone else.
Consummate with other microbes and gain their traits
Consume food, drop bricks
Drop bricks in the right pattern and build wondrous machines, tools and other amazing things.
Spawn food regularly in rooms
Communication between players
Make other players visible if they're in the same room as you