Yeah, just tried a fool's mate! It didn't /quite/ work, but pressing on still led to a very early mate, after dealing with an inconvenient pawn. (I think about 15 moves total?)
I expected it to play like Ed's Chess on DOS, which I always had trouble beating. IIRC that engine looks 3-4 moves ahead usually, but 6-7 moves ahead when it needs to. No idea how big the equivalent JS would be.