This specific version, often denoted with a "W" in file naming conventions to indicate it is a "Windows" build (or simply part of the versioning string on certain repositories), introduced significant plot advancements, new characters, and quality-of-life changes that reshaped the early game experience.
The game is available across multiple platforms, though installation methods vary: Summertime Saga 21.0.0-wip.7164 для Windows summertime saga v0205 win mac android w