with better graphicscould be a good game. The red and yellow turrets seem to reduce range and damage when upgraded. They were pretty useless. Also it was a bit too easy. There was no indiation of where the enemy would come from at the start.
node616, pick out a piece with the blue hat on and move it to the top of the screen. hover over each segment and when it is in the right place it will stick.
even after passing a level it was not clear what I had done to pass. I just clicked and moved until something happened. I bit more information would be good. After several levels all I could do is rotate the two odd shaped things and move one of them. I tried every combination but I could not pass the level.