Hello everyone,
(I hope it's OK to self-promote here)
I've given up on my entry but I'm releasing this little trick I found (back during GBJAM 3) to easily switch between different color palettes. I thought this might be useful to anyone who's making a GBJAM game using Construct 2.
https://ludonaut.itch.io/palette-swap-template-for-construct-2
It's super easy to do really. Feel free to use this in your projects, you don't need to credit me or anything.