Harbor Stack

A mobile-first harbor puzzle: pre-seeded board, finite cargo queue, connect 3+ same colors, gravity and chain reactions.

• 500 puzzle levels (solver-checked)

• Score, stars, local highscores

• Hub missions + undo

• Endless modes (Solo / PvE)

• Fully offline after load — progress saved on your device

• No account, no ads, no IAP

How to play

1. Drop the next cargo into a column

2. Clear groups of 3+ matching colors

3. Empty the board before the queue runs out

Short sessions. Keyboard or tap. Best on phone or portrait window.