Managed to survive just above 3 minutes in all my attempts, I assume that's good.
I really enjoyed how the circle encouraged you to follow it, but maybe the darkness could be even more debilitating, as I could still parse things just fine in the darkness (but that's an opinion).
Perhaps being able to see what powerup you can get might make things even more interesting as well, like intentionally saving the shield powerups for late game?
Overall though, it's very enjoyable ^^