I probably won't port it to other platforms, however, as I wrote in another comment, I am considering open sourcing it when it's done, so others can port it if they like.

I just looked up the MiSTer board [1]. They are using a DE10-Nano FPGA [2], which is a lot more powerful than the iCE40 UP5K [3] that I'm using (for comparison, the DE10-Nano has 110,000 lookup elements, whereas the iCE40 UP5K just has 5,280, so ~20x difference!). So porting should be pretty easy. It also opens up opportunities to increase the resolution, frame rate and render distance.

[1] https://github.com/MiSTer-devel/Main_MiSTer/wiki [2] https://www.digikey.com/en/product-highlight/t/terasic-tech/... [3] https://www.latticesemi.com/en/Products/FPGAandCPLD/iCE40Ult...