What a fun game! It reminded me of my nights playing ShapeZ, really addictive.
One thing that bothered me a bit was that the shapes ran out very quickly. Eventually, my gameplay became practically just moving the harvesters around because they were always running out of resources.
But that's a minor detail; I had fun for a good 20 minutes, and I didn't even notice the time passing.
This was my astroid factory based solely on squares!
