agree with jpuroila - placing the peaces is kind of difficult. the first couple of minutes i just played on one 4th of the field because the pieces wouldn't stick to the rest. After filling up that space i realized, that i have to place them multiple times till i release them precise enough for being accepted. Than again, after another couple of minutes almost everything was filled up till i wasn't able to fit in the last piece. Since there was no game over i just realized, that there has to be some way to rotate them.