Navigate a grid of river buoys by matching the signed change from one number to the next. Play 24 levels in each of three difficulties. The 3D playfield supports touch and mouse, with keyboard controls and optional sound.
How to Play Delta Beacon
Start at the green buoy. Follow the change shown on the dispatch, such as plus 3 or minus 2. Tap a neighboring buoy with the correct new value. The route never revisits a buoy. Undo to backtrack if a fork leads to a dead end. Choose Easy, Medium or Hard, then pick a level. Clear a stage to move on, or use the restart button to replay it.
