Shellslide NRM

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.