Four columns make Aces Up look small, but each new deal hides another layer of cards. Your task is to remove everything except the four Aces, using exposed cards of the same suit to decide what can leave the board.
Unlike FreeCell, this game has no foundations to build and no spare cells. Compare the top cards of separate columns: when they share a suit, the lower-ranked card can be discarded. Aces are highest, above Kings. A red heart and a red diamond are different suits, so color alone never makes a discard legal.
An empty column is your main planning tool. Move an exposed card into it to uncover the next card underneath. That may reveal another discard, or let you move an Ace away from cards it is trapping. Try to make the gap useful before taking more cards from the stock.
The Card Game Nook version starts with four face-up cards and 48 in the stock. Each stock deal adds one card to every column, including empty ones. Clear available discards first, then keep working through the deck. A win leaves exactly the four Aces; an unfinished board is a reason to try a different deal, not proof that you missed a guaranteed solution.