Play Marble Tracks online

Twelve original 5×5 height puzzles, solo or up to eight cooperating players. Enter the northwest cell from the west at height three; exit the southeast cell to the east at zero. Select a track, preview a rotation, then confirm, or explicitly choose Swap and then a destination, including an empty cell. Selecting another track normally just changes selection. Highlighted ports show heights. R / Shift+R rotates, X selects swap, Enter confirms and Esc cancels. Neighboring ports must meet at the same height; the marble cannot climb. Test the route to see where gaps, mismatched ports, edges or loops stop it. Reach the exit to solve. Hints suggest one swap or rotation along a known solution. Rooms synchronize edits and test actions; the browser animates the marble. Restart advances to the next puzzle.