If you have a slower computer, you may wish to use the VGM version instead.
Phantasy Star in Phantasy Star collections is actually emulated,  which means,
by playing these gsfs, your essentially emulating a sega master system in a gba
emulator, which is going to be a performance hit on slower machines. Take note
of the CPU display in Highly Advanced,  you will see that it is a constant 99%.
There is nothing I can do about that.