I can imagine this game making lots of bucks but not as much as it's competitor Pokemon Go because it's basically as the duplicate of New Super Mario Bros, playing a different version of it but in the android device doesn't make much of a difference. Unlike Pokemon Go, you have the ability to explore around and do stuff in real life in order to continue the game, and people like that kind of game-play.
The free demo is fun, but frustratingly short. I think this game is a good idea, but I know I, for one, am not going to buy it. It has really good graphics, physics, and control mechanisms, but I am not a big enough fan of this style of game to pay to play it. I think they should make it so that you can buy parts of the game, but the core levels are free (And maybe you need lives to play, which only restore at 1/day, unless you pay). I think they would make more money with this alternate scheme, but I am not on the development team, so I don't get any say.