209.Crossed Lines

Locked in the game until all 200 levels of chapters 1–20 are solved. Then the bonus chapter opens, and its steam parts join the sandbox.

Goal: Keep the powder keg whole. Light the bulb, then blow the whistle.

Three boilers, a tangle of crossing pipes and a row of candles share one huge board with a powder keg that has to stay in one piece. Light the bulb at the far left, then blow the whistle.

In your toolbox

• Candle ×1
• Steam Pipe ×7
• Steam Tee ×2
• Steam Valve (yellow) ×1
• Steam Whistle ×2
• Button (blue) ×1
• Button (red) ×1
• Light Sensor (yellow) ×1
• Mirror ×1
• Plank ×1
• Steam Valve (red) ×1
• Inverting Valve (yellow) ×1

We never post solutions. Stuck? Tap the light bulb in the game for a hint.