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Yesterday’s Light
Change the past in a tiny 3D garden puzzle
Change a garden in 1996 and watch the consequences unfold in 2026. Redirect water, grow a bridge from roots, and guide light home across six short puzzles. Built with GPT-6 Astra in Codex. Free to play in your browser, with no sign-up or runtime AI calls.
Hi Product Hunt, I’m Hengfei, the maker of Yesterday’s Light.
What if a small change could travel thirty years?
In this little 3D garden, you change the past and watch the future respond. Close a sluice to reveal a flooded path. Plant beside a broken bridge and let the roots grow across it. Turn a reflector so light can reach a forgotten window.
Six short puzzles explore water, growth, light, storms, and drought. You can compare 1996 and 2026, scrub through time, and undo a choice whenever you want to try another idea.
I built it with GPT-6 Astra in Codex for this challenge. Astra helped develop the game rules, 3D scenes, interactions, and fixes from browser playtesting. The build process used AI; the finished game runs entirely in your browser. There are no runtime model calls, sign-ups, or paid gates.
I wanted something people could explore through small, visible actions. I’d love to hear which change surprised you, and where the connection between an action and its consequence could be clearer.
Thanks for visiting the garden.
About Yesterday’s Light on Product Hunt
“Change the past in a tiny 3D garden puzzle”
Yesterday’s Light was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #85 on the daily leaderboard. Change a garden in 1996 and watch the consequences unfold in 2026. Redirect water, grow a bridge from roots, and guide light home across six short puzzles. Built with GPT-6 Astra in Codex. Free to play in your browser, with no sign-up or runtime AI calls.
On the analytics side, Yesterday’s Light competes within Puzzle Games, Games and OpenAI Day — topics that collectively have 103.2k followers on Product Hunt. The dashboard above tracks how Yesterday’s Light performed against the three products that launched closest to it on the same day.
Who hunted Yesterday’s Light?
Yesterday’s Light was hunted by Hengfei Yang. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of Yesterday’s Light including community comment highlights and product details, visit the product overview.
Hengfei Yang