Some of the games I attempt to play in Wine have "WebGL not found" (paraphrasing this) and WebGL works just fine outside of Wine (the whole spinning cube and all).
And a good chunk of the other games that I try playing say that NW.js is outta date (or at least not the same version) and might work but often will just freeze in the start menu.
And a good chunk of the other games that I try playing say that NW.js is outta date (or at least not the same version) and might work but often will just freeze in the start menu.