A Game That Divides Opinions?

Just a puzzle game where you merge numbers to make bigger ones. I don't quite understand the leveling rules, but things increase when you merge. There are frequent short ads (I don't find them bothersome). Sometimes there are long ones too (a bit annoying). The trick is to group small numbers that fall down with nearby identical numbers. If you leave them, they become unmovable spots, so do it early. Gather the larger numbers towards the center. From the left to the center, from the right to the center. It's a game I'm pretty good at and enjoy, but I'm busy with other games and responsibilities, so I can't dedicate much time to it. I want to clear the hidden quests quickly.