I have already attempted that and failed miserably. And besides, decompiling the full version and them posting the web build for free is illegal. I only target free games anyone can get, so they can be played on chromebooks and hardware similar to such.
I don't even own cuphead lol, and again, that's a ME specific thing. Other creators can port paid games if they wanna, I just don't want to in fear that the creator will pursue legal action against my port.