I love this game
I played the free version for weeks before getting the version without ads. They just added some extra levels with little vortices and blocks you have to hit thrice to make disappear. I initially found this game while looking for Tetris. You can play with only 4 block pieces (basically Tetris) or with only 5 block pieces (Pentix, which is harder) or with a combination of 1,2,3,4,5 block pieces. It took awhile to finish the Pentix challenge series. You can play by level and level up through challenges, or play the regular game, or play a random “adventure” level.