As for my hint...
It's.... Ahem... a mobile game. You buy it once, and you have it forever, no microtransactions and it is constantly updated with new stuff.
As for the gameplay, it is a autoscrolling platformer, accompanied by some cool techno tracks, and tough as nails levels that as you reach the harder levels, you might have to go through thousands of attempts before you make it, presuming you ever do....
It's really fun though
Oh, and it has a level creator and you can share your levels online!
EDIT: I wouldn't really expect anyone to get this one though, as there are literally millions of games on the Apple Store/Play Store. If it helps, this game costs 1.99$