Really enjoyed it but it has its share of problems. First the controls. One slight tap on the mouse sometimes seems to push just slightly the block...sometimes it does much more than needed. Secondly after a whilte (below 60 maybe?) the levels become unforgiving. This results in a gameplay which relies not on the dexterity of the player but rather the player's ability to learn the level by heart and push the button just at the right millisecond. Other than that..excellent.