Standard 2048 with better presentation and, importantly, an undo button.

Undo changes the game more than it seems. With it available, 2048 stops being a game about avoiding mistakes and becomes one about exploring lines — you can try a swipe, see what spawns, and reconsider. Purists will find that hollow; anyone trying to actually understand board states will find it the most useful version here.

Use undo as a teacher, not a crutch. Take a move back, look at why the board got worse, then make a different one. Two or three sessions of that will improve your unassisted runs more than a dozen honest games.

Score tracking makes progress visible across runs.