From the author's README on Thunderstore

Brings the beautiful, cherry-blossom-filled Hanamura environment from Overwatch straight into your game! Created by geneticdish.

Features

Reconfiguration of the classic Hanamura aesthetics and layout.
Custom assets and immersive environmental details.
Fully compatible with standard multiplayer/singleplayer modes.

Installation

The easiest way to install is using the Thunderstore Mod Manager or r2modman.

Automatic Installation

Download and install the Thunderstore Mod Manager or r2modman.
Click Install with Mod Manager on this page.
Launch the game through the manager.

Manual Installation

Click Manual Download to download the .zip archive.
Extract the contents of the archive.
Move the extracted files into your game's plugins folder (typically located in your BepInEx/plugins/ directory).

Feedback and Support

If you encounter any issues, bugs, or have suggestions for improvements, feel free to reach out or check for updates:

Creator: geneticdish
GitHub: https://github.com

Disclaimer: This is a fan-made mod. All rights to Overwatch and its original assets belong to Blizzard Entertainment.

Install Overwatch Hanamura

You need ReSkate and your own copy of skate. on Steam.

Open ReSkateLauncher.exe and go to MODS.
Search for Overwatch Hanamura and click install. The launcher also installs anything it depends on.
Press PLAY. In game, the MODS tab of the ReSkate menu (Insert) turns it on and off.

Or install it by hand: download the .zip and drop it on the launcher window, or unzip it into its own folder in Mods\ beside Skate.exe.

Maps show up in the ReSkate menu's level list. To join a server running a custom map, you need the same map installed. If the game won't load after installing, see known issues.

skatemods doesn't host or review this mod. The download comes straight from Thunderstore. Only install mods you trust, because scripts can run code.