Block Puzzle Sudoku

I've tried a few sudoku block style games and so far this is my favorite. Where other apps seem to purposely create impossible situations that require you to view ads, this one frequently gives blocks that require a thoughtful but not impossible response. The ads are more... creative than I've seen in other apps but they are relatively infrequent and I view them as their own sort of puzzle, like an escape room.

I can tolerate the ads, and the actual play is decent. However, the games take a long time once the scores climb, and they can't be played out in one session. Most of the time the game will preserve the game status between sessions. HOWEVER, once in a while, for no reason, the game will reset, leaving the player with zero score. This has happened several times to me at around 15-20k points, so I am finally giving up and dumping it.

Game is average for a typical block filling game. The biggest complaint is that when picking 1 of the 3 Completion Chests where you can win 1x, 3x or 5x bonus,....ITS RIGGED to only payout the 1x benefit the vast majority of the time. Pathetically obvious and makes you want to Uninstaller everyime you play. Still just paying our 1x Bonus Box. Pathetic! Stopped playing. Related to 1 star.