Thank you for the good feedback <3 I tried playing with the idea of bullets staying on for ever but it made the game very hard. Maybe I'll increase the amount of time it stays on the screen.
I had an idea to have enemies rush at the player and had to signal the player. Think i'll implement your idea as well.
Lots of possibilities for juice all around :) I'll add some of it over the weekend and put up a proper post-jam version.