Must admit a couple of these levels had me aggravated to the point of giving up, but I'm glad I persevered all the way through it! The idea's a fun one, the levels varied, the mechanics good (though sometimes the click feature bugs out and doesn't have an impact on the block - right when you start a level - maybe some kind of click/time limitation), and in the end it all felt like a pretty accomplishing session. Victory! It's a mechanic that's possible to master with precision and timing, too. Good albeit sometimes aggravating fun.