Very simple bullet hell game, maybe you could make x and o make something like speed you up and/or slow you down for more control. All in all very nice

Bullet hell in it's simplest form, but still very effective. If you want to expand on this, it could he great to use patterns instead of random generation. Huge spirals, rows, columns, ... As mentioned giving abilities, like a dodge could add some spice to the game loop. Thank you!