Hey thank you! I'm 100% pooling all projectiles, but I haven't profiled the game so the problem might be somewhere else. Color coding was physically impossible for me, because I used a monochrome shader instead of keeping the art black and white, but I agree some things could be color coded. The "more powerful" is just more fire rate (also more shot speed and more recoil but that doesn't increase the power), so it's not that significant. But there could be an UI element that shows you that.
Thanks for the incredible feedback!