Ok, well. The game engine is a tricky one. I know what it is, and can easily do everything required. But it isn't anything known to everyone. So, I don't really know. (and I'd rather not mention the engine specifically right now)
As for the graphics modes, if it is wanted, of course! Though it does of course depend on the situation at the time.
I also aim to include an anaglyph 3D mode (or separate game altogether), being that everything has a layer. I think that the parallax would look really nice like that. And, I will definitely be sprucing up all the backgrounds, so they look more entertaining with or without this mode