Dude this is really well made!!!! Would LOVE to see a bop-it extreme 2 variant of the game made for a system that could support the 5 buttons needed for that version of bop-it.
Perhaps the Sega Genesis with the 6 button controller, or the SNES could work.
The GBA could also be viable, with emulators handling a comfortable button remap for the select button that'd be needed to run that on a GBA.
I'd be willing to pay for a bop-it Extreme 2 variant of the game if you ever made that.
I used to play on a physical one for HOURS with someone who used to be a friend back in 2009, and I've been "chasing the dragon" so to say, ever since