Inconsistent gaming rules
I have never seen a game where how you play (ie the metho for clearing pieces from the board) are randomized. Instead of consistent gaming rules, it varies from play to play (the adjoining pieces “collapse” on to one another. The 1 minute ads are incessant, so your ratio of ads to game play is 2:1. Thankfully, after a day or two you’ll just delete the game and move on.