Apps & tools ·
How this whole island runs in a browser tab
A whole tropical island you can explore in a browser tab. Birds dive for fish, crabs burrow into the sand, a whale swims past the reef, wind moves the palms and the dock lights come on at night.
Developer Dan Greenheck built it in about 8 hours with Claude Opus 5.5, mostly with simple prompts like "add X" and "make it better". The run used $1,874 worth of tokens, about 59% of a weekly Max plan.
Made by u/Outside-Iron-8242. This write-up follows the original post; it is not an independent product test.
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