Vic fix this issue on older windows versions:
WebGL works fine btw
but its laggy as hell
For those who want mobile
Click on this link: https://github.com/Wark19/NSMB-Mario-Vs-Luigi-Mobile/releases
try using this: https://github.com/Wark19/NSMB-Mario-Vs-Luigi-Mobile/releases
sorry if i have already answered this