Shellslide NRM is a tide-pool sliding puzzle built from spiral shell fragments on a coastal board. Drag a tile when a clear row or column path reaches the empty gap, then watch it glide into place with a short animation. Locked corner shells stay fixed on harder shores, shrinking the movable set and raising planning pressure. A move budget limits careless dragging and rewards short routes that finish the spiral quickly. Ocean colors, shell arcs, and wave accents set a calm coastal mood. Complete the shell pattern across three levels as grids enlarge, locked pieces appear, and the margin for wasted moves grows thinner.
Drag shell tiles along clear lines to fill the tidal spiral puzzle gap.