Ported to SMBX2
Super Mario Retro has now been fully ported to SMBX2 and will use it going forward.
You probably know this already but, I can now implement custom objects as well as use 16-bit sounds in 16-bit levels, and 8-bit sounds in 8-bit levels. SMBX2 also uses a better sound driver which in my case fixed a music-looping issue I had with smbx 188.8.131.52, fullscreen is no longer stretched out, and overall SMBX2 allows for better performance and more customization.
If a new beta/release of SMBX2 is released, I'll port it over to that as well. SMBX2 Beta 4 has its problems, but the benefits far outweigh the negatives.
Beta testing begins tomorrow! I'm not going to post a build of the game on this website or the SMBX forums because the game is in a very incomplete state, and I don't want to spoil it for everyone. I'm only gonna send it to a few trusted friends of mine. If you recieve a copy of the game, be sure to give me feedback on what you think of it.