- Validate tile exists in player's hand before executing placement
- Draw continuously from boneyard until playable tile found (with 400ms delay per draw)
- Tile flies from hand area to board position instead of instant scale-in
- Visual boneyard pile on left side with live counter
- Multi-wave confetti + starBurst + screen flash on match win
- Proper tile aspect ratio (34x68, 1:2) with 8px hand spacing
- Flush tile contact on board (GAP=1)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>