The game will have more updates or do you plan to make more games for android but the game you just released will provide more updates such as posture options etc so we are only looking at ;)
I'm not sure. I just know it's a feature of Unity. I don't think you convert it from exe, I think you just build it from Unity as an apk. I haven't worked with Unity but I heard it's straightforward.
Yes, it is quite easy to make an apk build, but that's not the problem. There isn't enough space for an onscreen display without hindering the gameplay.