Prism Furnace

Power the furnace with 18 discharged orbs. Sort the interleaved supply into four chutes; three equal top orbs discharge and cool the reactor. Every drop heats it. Mix cycles the next color at a heat cost. Two emergency vents cool three heat but discard the next orb. Eight heat or six stacked orbs ends the run.

Tap controls, or Tab then Enter/Space. R restarts. Numbered coordinates identify board cells. Every action is turn-based; take time to plan.

Discrete chutes substitute for VR throwing; color preparation and reactor hazards remain.