Copper Glow

Copper Glow is a skill-based forging game. Heat each copper blank on the
charcoal forge and watch its glow shift from dark red to cherry red to
orange. Read the color against the gauge band, then drag the piece into the
water trough at just the right moment: too early and it stays soft, too late
and it burns warped. Every quench warms the water, so change it in time.
Finish each good quench with a gentle tempering pass at the straw-gold
color. Later levels bring thicker stock, unstable furnace wind and narrower
color windows. Earn coins and unlock six real workshop upgrades.