okay, here i go, use the arrow keys to move and fly. the grass block follows your mouse pointer. press space to place a block. click play world when finished to spawn. click random seed to change setting, or in minecraft language, seed. and lastly, click skin change to change your character's look.
this is alpha v.1 and more things will be added very soon. credit to MinecraftCrafter. here are some things that will be coming soon. 1. crafting 2. mobs and animals 3.life and possibly hunger.