I’m curious to know if I could create a game using Construct 3 and then sell it to a different developer who doesn’t use Construct 3 as an engine.
Develop games in your browser. Powerful, performant & highly capable.
You wouldn't be able to - the engine is integral to how the game works; even one entirely powered by JS would refer to elements populated by the IDE
No, but then again the reverse would also be no.
Nothing works like that.