Lots of fun. The mainframe mechanic is clever, though I wish I’d known towards the beginning that purchasing the first two boosts would eventually unlock “streams”.
One interesting bug: if you have two magnets on opposite ends of the rift, many shards will collect in the middle, pulled by both magnets, and not move. There are a couple of ways you could fix that, but the most obvious would be to make magnet strength proportional to the inverse square of distance (the way real magnets work). That will make the pull sufficiently unstable that you’re unlikely to get stable points between the magnets.