Despite the UI and challenges that other reviews are about ill try to be honest as I tried playing this for a while.

Starts fun if you like sudokus. First reaction was to try to solve it and get the upgrade for more points for solving right numbers. I played on mobile so I couldn't do right clicks but that didn't stop me. I got the automations and the other upgrade to get money by removing numbers. This got me flying and it reminded of incremental game.

Then time for challenges. They were pretty obvious if you read the name and watch what happens on sudoku board. Upgrade was 1.1x multi, next got me to 1.32x, 1.52x and so on. When you start challenge all resets except guessers so there is no point in doing other than challenges.

Finally I got to 4x multi and had 22 solved puzzles, next challenge unlock was at 25. At this point automation was still around 3 seconds so I hit a huge wall of just waiting. This is when I got bored and started randonly clicking boxes to find out you get more money by pressing boxes fast than actually solving. I set up autoclicker and got to a million to buy bunch of upgrades but it got me only to near 2 second automation. This is when I realized 4x is way too little multi and stopped playing.

I do not recommend this game if you like sudokus because to progress you have to not play sudoku but instead just autoclick, buy automations and wait a bunch. It is clearly neither tested by anyone but dev before posting here so here is honest review to you from a tester.