Still in early Beta so there is nothing to do yet use w,a,s,d to move around and if you hit space you launch a missile that follows your cursor and explodes when you hit enemies. Keys Press space to launch a missile that follows your cursor and explodes when it hits enemies. w,a,s,d to move around in the water.
I used a movement script from mikeono102 so thanks to him and you should definitely go check out his games.