This game is amazing, both as a concept and execution wise. It's so clever, so unique, and so interesting to play. Everyone who likes shmups or Koishi should play this game.
Still, it's not perfect. Some spells are a bit too easy to just cheese by never opening your eyes. I got a two miss clear purely due to luck by just closing my eye. The game could probably be tweaked a bit to prevent this, but maybe the point is that its easy to close your eyes, and painful to see?
Still, jams are more suited for interesting games than perfect ones, so in that sense, this might be the perfect jam game?