It's definitely possible, the problem I see is not the timing, nor the materiality of the project, but the choice of engine.
Unreal for a point and click game seems too overkill. I myself would not download gigabytes of data for a point and click game, I'd definitely give it a try in my browser though, or in mobile.
I'd use a simpler, more user friendly engine (for other non-programmers in your team to be able help you as well) that supports web applications, because Unreal dropped its support. I'd go with Game maker instead, or Unity if you don't want to pre-bake your scenes.