Is this safe to download this game free? Normally it's £1.99 in the store (windows 8)

Is that an app?
I saw once that Paint Tool Sai could be downloaded from the same website, but since nobody talked about it much, I'm guessing that it was a scam so nobody bothered. Maybe it's the same case here.
In any case though, I wouldn't download it because it is so easy to add a virus into these sorts of files.