The game looks awesome. Are you interested to work with me to port it to AmigaOS 4 and MorphOS platforms? They are both based on PowerPC CPUs and the latest SDL2 is available. Now, depending on what other libraries are used, I could see if such a port would be possible or not.  Please let me know if you are interested and let's discuss it.

Probably! I was looking into AmigaOS but I don't even have any hardware to run it on, so I'm not sure if I could get it to run

Thank you for your reply and interest. That would require specific hardware I am afraid. This could be done with emulaton but it is unstable and really slow. What I would propose is first to let me know the required libraries so to see how feasible this is. Then we can discuss for the next steps. Also we can try an older version and see how it goes.