My engine is homemade, I’m focusing primarily on perfecting networking/server stuff in a way that would make the “what if I lost internet/what if I don’t want to play online every” people happy. My prototype is 2d placeholders. I plan on doing some experiments with 3D before deciding to go all-in on an art style or 2D vs 3D. I currently do not have any music or sound effect assets. I haven’t published anything yet, but to oversimplify, pretend that I’m making an Advanced Wars 2 clone.
I would absolutely to love to have any of those with access to paid gamedev assets, as I’ve not bought any, or acquired any that were temporarily free, and will be relatively poor until after I win the gamedev lottery.
I’m not using Unity tho, so if any of those are vendor-locked to Unity (license or otherwise), maybe the next person should take those.