I've been playing "I'm Not Sudoku" recently. This game is quite interesting. On the surface, it's a numerical logic puzzle. In fact, at the end of each level, a pixel painting is unlocked. The feeling of filling the grid with cats, dogs, and pixel-style scenery emerges, which is more fulfilling than pure numerical calculation.
As a viewer who watches KPL all year round, I usually focus on things like hero strength, equipment adjustments, and lane changes when talking about version updates. I didn't expect that similar problems would occur in puzzle games when changing tracks. For example, every time "I Am Not Sudoku" updates the level package, it does not simply pile up the number, but will simultaneously adjust the presentation of clues. For example, after a certain update, the numbers on the left side of some difficult levels no longer only give the total length of a single line, but are refined into multiple segmented numbers. The number of permutations and combinations that players need to consider when coloring instantly increases, and the logical chain becomes longer. This reminds me of the adjustment to the refresh time of jungle resources in LOL. It seems to be just a numerical change, but the jungle's invasion route and dragon control rhythm all need to be reconstructed.
And the developers seem to be deliberately controlling the cost of violent trial and error. The early version had unlimited undo, but later it was changed to a limited number of prompt keys, so players must be more careful. This is like changing the duration of the red and blue buffs from 70 seconds to 75 seconds in Honor of Kings. It may seem insignificant at first, but it will actually affect the mid laner's lane change timing. I can understand this design intention of encouraging in-depth thinking, but for players who are used to quick trial and error, the adaptation period in the early stage of version updates will indeed be a bit painful.
What I appreciate most is that the game is completely free, there are no in-app purchases, and level updates are pushed directly. Compared with many mobile games that rely on new heroes or skins to stimulate consumption, the iteration of "I'm Not Sudoku" is purely to optimize the logical experience. This attitude is quite rare in the current mobile game environment. If you also like to relax while using your brain, or want to change your taste between games, I highly recommend giving it a try. After each version update, you can re-solve old levels and discover new problem-solving ideas. It's a bit like a professional player watching old version game videos and always learning new things.