The ideal level of complexity for a mobile game I can get into: not too involved or distracting, but engaging enough that it doesn't feel like mindlessly tapping for a reward in a colorful skinner box. Genuinely challenging and a lot of game to sink your teeth into, and it also looks and sounds great. It even started doing some Tetris Effect shit to me where I started seeing creep combos when I closed my eyes. Ultimately my biggest problem is that, even without the free-to-play model, it still does that mobile game thing of "oh you're in the last set of levels? well now everything's going to be so hard that you either do a level over and over again or spend your resources on overpowered items that have now become necessary to complete the level." Still pretty good though, check it out if you end up with a free sub to Apple Arcade.