I first had the chance to play the iPad version of this at a TCAF event in Toronto. Super fun, cute, and minimal, with a high skill ceiling from what I could tell in the fifteenish minutes or so I had with it. I used to play stuff like Sub-Terrania (and the bubble-ship level from Earthworm Jim) and this reminded me of a streamlined version of those kinds of mechanics.

Two-button controls, each of which turns your ship a different direction while it jets forward automatically. Your trail damages enemies, and you try to grab the gems they leave behind.