i see where you're coming from but i forgot to mention it's designed to be easily ported to other consoles such as ios/windows/mac/linux/ps3/ps4/xbox360/xbox one/wii/wii u/ds and 3ds/flash(online)
so far where got in on ios/windows/linux/wii/ds and 3ds (no sound and graphics bugs)/flash (low fps) and i got it on ps1 but who who'd want that (the console has not aged well).
but the mane console is the gba because it is the easiest to develop for and it a good retro graphic middle ground not like modern "retro"game's they use new hardware and looking at the pixels none of them are realistic to run on retro hardware apart form the game retro city rampage bit that was originally designed for the nes and look where the game is now.
so far where got in on ios/windows/linux/wii/ds and 3ds (no sound and graphics bugs)/flash (low fps) and i got it on ps1 but who who'd want that (the console has not aged well).
but the mane console is the gba because it is the easiest to develop for and it a good retro graphic middle ground not like modern "retro"game's they use new hardware and looking at the pixels none of them are realistic to run on retro hardware apart form the game retro city rampage bit that was originally designed for the nes and look where the game is now.