I used to use the BGE as my main tool for years as well, but it had some issues that I wasn't satisfied with. I'm not sure of the current state of the BGE at the moment, so I can't say for sure how it is anymore. My main problem was with crashes on a system, and being unable to debug it (because the codebase is a bit large, to say the least, haha). Maybe the issue was the user didn't have the windows C++ redistributable.
In any case, I would recommend that you test on a variety of different users' machines to ensure that the game runs smoothly.
Anyway, keep it up!