Taken directly from the "Wishlist" board, here are your requests.
The most popular one...will be part of the next mGalaxy version.
(1) Customize layout :
Change the background, fonts, size and position of elements on stage and keyboard mapping
(2) Extend to other Emulators :
Raine, Wikawaks, Kega, Zsnes ...
(3) Add sounds :
Add sound to scroll, launch/exit...background music?
(4) Trucated search :
On screen keyboard to type the first letters of the game (with Joystick and button)
(5) Filter working/available roms :
Only display the working games and/or the games in my rom folder
(6) Joystick/Joypad support :
Navigate mGalaxy with a PC joypad