Tetris Master
Tetris Master is the retro block-stacker in faithful form: seven pieces, one well, lines vanish, gravity accelerates, and "one more game" remains undefeated since 1984. Plays clean on mobile and PC.
No gimmicks — the modern quality-of-life is in the controls, not the rules.
Tip: build flat, die less. Keeping the stack level beats chasing tetrises until the speed forces your hand — then the deep well you kept on one side pays out. The tetris games tag stacks further.