Decubed campaign

A cube sits on an island of 3D tiles. It rolls over its bottom edge from cell to cell. Each cube face keeps a permanent color so orientation stays visible. Floor, glass, and mag-rail tiles drain when the cube leaves them. Switches toggle light-bridges. Rolling into the void tilts the cube off the edge and drops it. The exit stays sealed until every required tile is drained. Clear a board, then press Enter or Space to load the next. Arrow keys or WASD move one cell. The on-screen pad also moves. Rewind, restart, and zoom are on screen. Plus and minus keys zoom. Settings switches between framing the map and following the cube, and between diamond, soft-angle, and straight view angles. A color legend maps every tile and cube face.