Im not sure how to port unity games to android, but there are definitely some good tutorials out there. its built in to unity so i think you just need to add touch controls. the way you upload to the playstore is by going to the google play console and making a developer account.
This is a good game! But i think that you should slow down the movement speed a bit, but otherwise this game could be really successful! i think it would make for a popular android game, maybe as a procedural generated game?
Tell me all your ideas! i can contact my artist quickly if you want anything to do with art, and code suggestions i like will be implemented as soon as possible!