Equalizer

The board is today's 5×5 of numbers, the same for everyone. Grab any number and drag it into the small gap between two side-by-side numbers to neutralize them: the number you drag must equal their difference or their ratio (when one divides the other). All three numbers vanish: the pair and the one you dragged in.

Then gravity pulls the numbers down, and any two equal numbers that end up touching cancel for free, which can cascade. Turn the board (free, as often as you like) to slam numbers together and set off bigger cascades. Get the board as empty as you can, then Bank: your score is the number of drops you made plus the value of every tile left behind, so the lower the better. Turns are free. Restart anytime to chase a lower score.