Rotate

HTML: Use it like any other html. Open it up to play in your browser.

MacOS: If you have a newer  macOS version, follow the instructions.txt in the zip. Otherwise: Unzip the zip, drag "rotate" into your applications folder, then control+click it and select "open". Then, select open again from the menu.

Windows: If you have the windows version, extract the zip, find the "rotate.exe" or  file in the main folder and double-tap to open it. I am an unknown publisher, you will get a warning when you try to open it. It's not malware, but if you want you can just use the html.