Thanks for the insight! There are 5 weapons, getting a new one replace the oldest one. I made each weapon shoot ~5 bullets per second (25 bps total). The winning level is 20 where it goes to ~15 bps each (~75 bps total). But I didn't account for the bullets movement speed as some are slow and linger on the screen for a while. I'll make sure to tweak the numbers some more. I also like your idea of adding power ups, not forcing the player to not camp a spot but to entice the player to move. Thanks for playing.