I was early into mobile gaming, and it used to be AWESOME! It was a platform oozing with potential. Every game that came out on mobile was excellently crafted...until Candy Crush came out. It literally ruined the whole genre.
Doodle Jump wasn't the pinnacle of gaming, but everything about it was polished to perfection. The devs really put in the effort and finished the game, which is a rare feeling even in AAA games today.
But the potential was there, not a mtx nightmare in 80 percent of games. I would still say that great games like minedustry or better are still possible nowadays