3D browser game
DAM IT!
You are a beaver with a dream. Fell trees, haul logs into the river, and back the water up until it spills over the bank and floods a dry meadow. The water is a real shallow-water simulation, so a sloppy dam leaks and a flash flood will tear it apart. There is also a bald eagle that steals your logs.
Desktop only — it wants a mouse and a keyboard, and it locks your cursor.