itch.io

You'll want to use a "If Super GB Mode Is Available" event under "Control Flow".

Hmm, I'm not sure why this would cause lag.  I didn't notice any in my own testing, but I haven't tested much since the recent updates to GB Studio.  Are you using an emulator to test, and if so, which one?

Getting music to play through the SGB is a feature I've been working on but it's not easy to script as a plugin. But I would like to eventually have that feature included.

I believe it should. I haven't tested it myself but please reply here if you have issues with it.

The engine folder needs to be inside a folder (for example - "Topdown 2D RPG Movement") in the plugins folder of your project.

Glad you found it. This project is on a temporary hold until I get a new computer and get my workflow set up again, but I hope to get back to work on it very soon!