8.5/10
Okay, here's the thing: yes, the game is 10 bucks (which doesn't bother me at all), it requires an internet connection (ugh), and it's not a full-fledged Mario. Now that the house cleaning is done, this is a great casual Mario game. In fact, for the most part this is exactly the Mario game Nintendo should have made, but you can't go into it thinking it's going to be as incredible as the best core entries in the series. My 8.5 reflects how it functions as a mobile game.
Touchscreen controls are wank for most genres, so it only made sense to make a kinetic Mario game where he is constantly moving and you just tap the screen. They give you plenty of room on the screen, on the bottom, so you can always see what you're doing. Mario games tend to be balanced, and I think that's something Nintendo doesn't get enough credit for. This one is more of the same, except maybe a little easier because it's harder to die. Still, you have to concentrate in order to get through the levels and, more importantly, get the special coins.
The catch of the game is that while you can technically beat it relatively quickly, you collect the special coins in each stage, and then they put new coins in new spots. You can do this three times for each stage, so there is replay value in the campaign.
On top of that, there's a Toad Ralley mode where you basically go through the levels and use your stylish platforming in order to get more points/coins than your opponent. You are rewarded with Toads, and those can be used to populate your kingdom. The build mode is simplistic but serves as a welcome distraction from the main game: you can build houses, and buy decorations. Sure, it's not real in-depth, but it's still a bonus, which only adds to the experience.
Speaking of which, there could be more meat here, and that would be wonderful. They also could have added some new features like core Mario games tend to do, just to make it a little more exciting, because it's kind of the Force Awakens of Mario; it's incredibly safe but still undeniably fun, with the charm of this beloved character. But you have to keep in mind that this is a mobile game and it's not meant to be played for hours on end. It's meant to be played in short bursts, and it's not supposed to be intensive. As such, it doesn't amaze but it succeeds admirably in what it is trying to accomplish.
It's just a shame that they shot themselves in the foot a little, because while one single price lets it avoid F2P bullshit, they did the Nintendo thing and piled their own bullshit onto it (the required internet). It seems counterproductive, but I mobile game in places that have Wi-Fi usually, anyway. Others may not, however, and that should be considered.