Hello Itizso!
Thank you for the work you're doing with RetroFab it's amazing.
I have two things that I need to bring to your attention.
1) Snoopy Tennis (SP-30) seems to be broken in it's latest version as there is never more than one ball in play at any one time. Trying the older version from 2023 it works as expected with balls flying everywhere! :-)
2) The RetroFab Player doesn't seem to like launching a .sim file as an argument either directly from command prompt or as a shortcut in Windows. It says "Unable to open simulation - does not seem to be a valid RetroFab simulation" - however dragging the .sim file onto the executable or starting the executable and dragging the .sim file onto the window works to start the simulation...
Thank you.