I love this. Made it to level 8 before I had to call it quits for the night -- but I've muted the tab and will come back. (I could just download it. I'm gonna just download it.) It's so satisfying to switch out a machine or plop the last bit of conveyor down and just sit and watch your changed shape proliferate through the shape factory which, if you're anything like me, is an absolute disaster of snakes and spaghetti sprawled everywhere. Just means there's more going on to watch. The ramp up in complexity seems reasonable so far, and though I haven't yet had an opportunity to use the [!] duplicator, I can't wait for the chance.
The fact that the shapes moving is often exactly in step with the beat of the music is just... *chef's kiss*.
All in all, I'm incredibly impressed with what you've done with the limited screen space. Everything is clear, the Help menu is a huge... help... and the gameplay depth is just right. A+, well done.