Game development can be simple, but the game with either be boring (games with thousands of identical rooms are simple to make), or trivial to finish with no replay value (because there isn't much you can do). In the real world games are all complex as making an immersive world requires complexity.

There are a few games like suduko that are about that are simple and yet have high replay ability. If you can come up with another game on these lines great, but such games tend to be very different from the things. Good luck in making an exception.