- Replace the flat felt background with a canvas-generated beige fabric mat (border band, dashed stitching, subtle weave tile, vignette) plus a deeper "pocket" panel behind the board so pieces read as resting on a puzzle mat.
- Add soft drop shadows to jigsaw pieces via an extra shadow pass before the art fill, and pad the piece canvas so the shadow isn't clipped.
- Rebuild the menu into two columns (image picker left, difficulty + start right) with tighter vertical rhythm; make the thumbnail box size a `thumbBox` property so preview/border scale together.
- Consolidate panel background+frame pairs (menu, dropdown, win layer) into single graphics objects to simplify tweening and reduce node count.
- Use a separate invisible zone for table pointerdown so the mat image can be swapped without dropping input, and guard `onTableDown` against double-firing while a piece grab is in progress.
Brian Fertig