I like the idea of this, but I'm struggling to think of x86 games I'd want to play with phone controls. Maybe with a gamepad?
I wouldn't want to play action games with touch controls, and most PC turn-based games use mouse input that's fairly precise and often have small text.
Maybe because of the propietary nature of x86 platform and Windows.
Publishing x86 compatible stuff for free and with ability to modify can get you trouble.
RISC-V emulators and assembly simulators are more friendly because of that.