Raft Life puts you on a small wooden platform in an endless ocean and lets you expand it. You chop wood, fish for food, plant fruit and vegetables, and add new sections to the raft — turning a couple of planks into a floating island with buildings on it. There are sharks in the water, so the edges are never entirely safe.
It's the relaxed end of the survival genre: no fail state to speak of, no timers, and the progress is visible in the raft itself getting bigger every few minutes. Good for a background tab.
Collect wood and use it to build new raft sections at the edges. Each section adds usable area for buildings, farms and storage.
They patrol the water around your raft and can attack when you're at the edge or in the water, so build carefully and keep an eye on them while expanding.
Yes — it runs in the browser with nothing to install and doesn't demand much hardware.