I see, the current color swap could still work though. They just need to have some distance to the other color orbs when they spawn.
In my experience with the game, they appear on top of each other so it was hard for me to get to the color I want to be in.
As for the bullets, most shmups make use of white dots with colored thick outlines (like hot bright plasma orbs) maybe that can help. 😄
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Yeah I actually tested the color drops and I first had them drop in parellel but sometimes they would fall with an enemy bullet and be useless, then I added the wiggle and you had less control of picking your color and then I drop them vertical and i had a bit more of a chance to control the color, yeah i would have to spend more time with the enemy bullets.