I was wondering this recently, too. The two mobile games I miss most are tiny wings and the original fruit Ninja. But I remember playing Infinity Blade and other random games on my iPad touch that were really good back in 2010
I came across buried bornes 2, and it’s been ok so far. I have no idea if it has microtransactions or ads yet. It claims it does, but I’ve yet to see them. It’s not the best game I’ve played, but the concept is kinda interesting if you use your imagination a bit.