Mirror Kiln

An old glassblower has left you her workshop and a cold kiln. To light it, you shape lenses, prisms and mirrors at the furnace, then place them on the bench to bend a beam of sunlight onto the kiln's eye. Every new piece of glass you blow is a tool for later puzzles, so the workshop slowly fills with your own inventions.

The workshop is rendered in warm wood and refracted rainbows, and the glassblowing itself is a lovely, tactile minigame. There are 90 puzzles over roughly 9 hours, with no timers and no text beyond the labels. Puzzle fans who enjoy light-and-mirror classics will love it. The caveat: the last ten puzzles spike in difficulty and there are no hints at all.