Double the black-and-white section with 50 more stickers

Animals (mouse, sheep, cow, elephant, monkey, lion, sloth, bat, spider,
hedgehog, shark, seal, caterpillar, pigeon, koala, squirrel), weather
(snowman, tornado, wind, icicle), food (toaster, banana, lemon, cherry,
pudding, teapot, hot dog, lollipop, carrot, milk), objects (scissors,
padlock, candle, fan, gears, stapler, faucet, trash, tv, cursor) and toys
and symbols (yo-yo, spring, Newton's cradle, drum, trumpet, bowling,
basketball, skull, question mark, puzzle).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

gen/bw/puzzle/snap.js

@@ -0,0 +1,32 @@
+// two jigsaw pieces slide together and snap into place with a click spark, grin about it, then drift apart
+const{sin,cos,PI,atan2,max}=Math,T=2*PI
+export const frames=24,delay=70
+const D=(c,f,a=11,b=4)=>{for(const[l,s]of[[a,'#111'],[b,'#fff']])c.lineWidth=l,c.strokeStyle=s,c.beginPath(),f(),c.stroke();c.lineWidth=7;c.strokeStyle='#111'}
+// one side from (x1,y1) to (x2,y2) with a round tab (k=1) or slot (k=-1) in the middle; outward is to the left of travel
+const side=(c,x1,y1,x2,y2,k)=>{
+  const l=Math.hypot(x2-x1,y2-y1),dx=(x2-x1)/l,dy=(y2-y1)/l,nx=dy*k,ny=-dx*k,mx=(x1+x2)/2,my=(y1+y2)/2
+  const cx=mx+nx*13,cy=my+ny*13,a1=atan2(my-dy*9-cy,mx-dx*9-cx),a2=atan2(my+dy*9-cy,mx+dx*9-cx),ao=atan2(ny,nx)
+  const cw=((ao-a1)%T+T)%T<((a2-a1)%T+T)%T
+  c.lineTo(mx-dx*9,my-dy*9);c.arc(cx,cy,15.8,a1,a2,!cw);c.lineTo(x2,y2)
+}
+const face=(c,x,happy,look)=>{
+  c.fillStyle='#111';c.lineWidth=5
+  for(const d of[-1,1]){
+    if(happy)c.beginPath(),c.arc(x+d*12,2,7,PI*1.1,PI*1.9),c.stroke()
+    else c.beginPath(),c.ellipse(x+d*12+look,0,5,7,0,0,T),c.fill()
+  }
+  if(happy){c.lineWidth=3;for(const d of[-1,1])for(const o of[-4,0,4])c.beginPath(),c.moveTo(x+d*20+o-2,16),c.lineTo(x+d*20+o+2,10),c.stroke()}
+  c.lineWidth=4;c.beginPath();c.arc(x,10,happy?8:5,.15*PI,.85*PI);c.stroke()
+  c.lineWidth=7;c.fillStyle='#fff'
+}
+export default(c,t)=>{
+  const g=t<.35?22*(1-(t/.35)**2):t<.7?0:22*(1-cos(PI*(t-.7)/.3))/2,on=t>=.35&&t<.7,j=on&&t<.45?3*sin((t-.35)*80):0
+  c.translate(128,128);c.scale(1.12,1.12);c.translate(-128,-128)
+  if(t>=.35&&t<.52){const k=sin(PI*(t-.35)/.17);for(const a of[-.9,-.45,.45,.9])D(c,()=>{c.moveTo(128+sin(a)*20*k,90-cos(a)*20*k);c.lineTo(128+sin(a)*44*k,90-cos(a)*44*k)})}
+  c.save();c.translate(128-g,128+j)
+  c.beginPath();c.moveTo(-76,-38);side(c,-76,-38,0,-38,1);side(c,0,-38,0,38,1);c.lineTo(-76,38);c.closePath();c.fill();c.stroke()
+  face(c,-38,on,g>4?4:0);c.restore()
+  c.save();c.translate(128+g,128+j)
+  c.beginPath();c.moveTo(0,-38);c.lineTo(76,-38);c.lineTo(76,38);side(c,76,38,0,38,1);side(c,0,38,0,-38,-1);c.closePath();c.fill();c.stroke()
+  face(c,42,on,g>4?-4:0);c.restore()
+}