A bit confusing. Not really sure what you do in the first game, I got it to shoot blackholes one time but couldn't figure out much else.
I can see the second game you have to click when the loading symbol is at a certain spot, but can't figure out any logic to which it should be.
Last game is a lot of fun, though the power up that reduces sand doesn't seem to work as the sand just goes back up immediately after collecting it.