Great puzzle game. For some reason, the first level was actually the hardest for me. I don't know why.

Small bug as well. You can get a target and then hit "undo", which will give you back the piece you just had and the target will still be completed. This makes the last part of the last stage a bit easy since you can get the one blue target, hit undo, then grab the second one.

Kev: Thanks the bug report.