Awesome boss rush game! I'd really love to see your code to find out how you got this graphical style out of Unity. The project doesn't happen to be open source does it? :)
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Thank you! It's not open source, but I will gladly explain it. It's an URP project with a different global light for each color of the bloom, the bloom is very light but the lights affect it a lot. There is a dark blue vignette and some white balance. The explosions are obviously some particle systems and they also have attached lights that glow for just a moment for that flash effect.