Castles of Sand

What it is

Castles of Sand is a beach strategy game by Belen Luna and Lucas Lizama. You manage how wet the sand is, build sandcastles and seawalls, and hold back the rising tide. A character called Octo can chat with you in real time, with replies generated by Convai. The authors say Claude Code (Anthropic) handled the code, procedural vector art, UI and tutorial text, and Octo's character writing; the music and sound effects are credited CC0 assets made by people.

Who it's for: players who like relaxed building games that pit you against nature.

Before you start: it's a free browser game for phones in portrait mode and for computers. When you chat with Octo, what you type is sent to Convai, and we don't recommend typing personal information there. The title screen has a shop button; the game page doesn't say whether anything is paid. The screenshots are in English; the full language list isn't given. No official age rating is given.

Based on the game page's public information. Not tested by AI Inspiration World.