How to change mount point?

I have the game supertux in .appimage format and everything works, but I want to modify something in it, replace files.

I am using
./sp.AppImage --appimage-mount
and in the path
I have these files readable.

My question is, how can I change it so that the mount is in /home/myfolder/supertux because that will allow me to easily modify it?

The mountpoint changes every time and cannot be changed. This is by design so that applications cannot hardcode the mountpoint.

The mount is also read-only, because the data inside an AppImage is not changeable. If you want to change it, you need to extract the AppImage, make the changes, and then pack the AppDir as an AppImage again.

This also is by design.

I’d be interested in your use case.