Spider Millennium keeps going after a completed suit. Build king-to-ace runs to increase the completed-suit count rather than finish a fixed eight-run deal.
Completed runs feed the next challenge
Ten columns start with four cards each, only their top cards visible. Build down by rank regardless of suit; descending runs move together only when they share a suit. Any card or movable run can occupy an empty column. Clicking the stock adds a visible row, even if a column is empty.
Keep room for what arrives underneath
After a suited run is removed, new cards return to the stock and hidden cards are inserted beneath occupied columns. More suits enter play as the game continues. Use empty columns to separate mixed runs and uncover blockers before adding another row. A tidy board can change again after a completion, so keep receiving cards accessible.