Mac
1. Download the "Cthulhu's Spelling Bee Mac.zip" file
2. Unzip it
3. Open the application
4. If the file doesn't open because the developer cannot be verified, open System Preferences, go to Security & Privacy, and press "Open Anyway"

Windows
1. Download the "Cthulhu's Spelling Bee Windows.zip" file
2. Unzip it
3. Within the folder, open the "Cthulhu's Spelling Bee.exe" file

Linux
1. Download the "Cthulhu's Spelling Bee Linux.zip" file
2. Unzip it
3. Within the folder, open the "Cthulhu'sSpellingBee.x86_64" file