Watch it in action
🌪️ How it works
- A Tunnel is a blocker that stores several boxes in one position, feeding them out one by one; the number shows how many are still inside, not a countdown.
- The basic rule: check the number, drop or clear the visible tunnel box, the tunnel releases the next box, the number goes down by 1, and at 0 it is empty.
- Tunnels also block Hidden Box reveals: if a Hidden Box sits beside a tunnel box that still has stock, dropping it will not reveal the hidden one until the tunnel hits 0.
- A Tunnel causes three problems at once — it hides colors, delays Hidden Box reveals, and can jam the conveyor while you wait for the right box.
Pro tip
Start with the highest tunnel number (it hides more info) and prioritize tunnels beside Hidden Boxes. Do not drop random marbles to force progress — wait if the matching box is not ready. Watch the tunnel's final box, since hard levels often hide the most useful color at the stack bottom. Keep at least one safe match available before clearing a tunnel box so your next move has somewhere to go.
