I find this game is sorely lacking in guidance, so I'll offer some. As of today, WASD doesn't seem to work properly, so use the arrow keys. The Spacebar is used to select your "piece". Once selected, you can move your selection around the ring. You are only allotted a certain number of moves (first level is 10 moves), so make them count. To get through the first level you need to eliminate 6 lava and 6 water, but you cannot make any rocks. To do this, grab a cluster of 5 lava and move it below a cluster of 3 water. The water will disappear, and the lava cluster will only be worth 2. Now, do the same thing with another cluster of 5 lava and the remaining 3 water. You'll notice that destroying the water raises your counter, while destroying lava lowers the counter. It's inconsistent and counter-intuitive. I hope this helps anyone avoid some headaches, until some better instructions are posted by the dev.
 "Procedural terrain gen and terrain deformation"){kind=icon}
 "Kaizen : TerraFormers"){kind=icon}