WASD - move Click - break trees, place block, use item F - hide/show hotbar P - save L - load E - hide/show crafting menu 1, 2, 3, 4, 5, 6, 7, 8, 9 - select slot on hotbar.
There is now a mutant chicken boss that spawns if you defeat enough chickens, and a chicken sword that is the only thing that can damage it.