Idle Shapes

I recommend this game as long as you understand that it isn't a hands-off idler. The developer doesn't provide a FAQ or manual, so if you like completing achievements like I do, it either takes a little exploring to understand Idle Shapes' design. There are a couple cycles you repeat where you collect shapes, unlock different shapes, prestige bonuses, and multipliers, with one of the cycles nested within the other. The result is that you can restart and keep your unlocked shapes presetige bonuses, which will help your progress toward finishing the game. Once you finish the game (by collecting a million of the special prestige shape), you then can restart what I would call the larger of the two cycles and retain a permanent, stackable global multiplier. If you want to get all achievements, you'll anticipate restarting the inner cycle many, many times, while the main cycle that gives you the global multipliers will need to be finished maybe a dozen times. It's very slow progression the first time through, but the mutlipliers make the progression very fast after beating the game 3 or 4 times. Once you unlock the Autopick ability during each cycle, the game switches to become more of an idler until the next reset, and I think that's where the name becomes fitting.

Collect shapes to spend on upgrades to unlock meta progression do this for like ever and you can get the last achievements.