Wow, that's...very, very unique. And innovative. I don't think I've ever seen any other game like this, maybe that game about snakes that won game of the year a few years ago? But IMO the unique and original gameplay was hampered by the Windows 95-era graphics. There's a time and a place for those, and I don't think this was it.
Also it struck me funny how the first few shapes you unlock are literally just different orientations of the same shape.