Fall Guys located at fallguysmobile.com is a scam because it is only available on PC and PS4. Also, if you see ads for a mobile version they are scams. A video called 'Play Fall Guys on Mobile' appeared on YouTube claiming gamers can play the game on mobile (iOS or Android). But Mediatonic Limited, the game developer, confirmed that Fall Guys is currently not available on mobile, and the advertisements on YouTube are fakes.
The Fall Guys Mobile Scam on YouTube

Fall Guys released in early August and instantly became a hit, reaching 1.5 million players in 24 hours.