Is there any different way to download this game? I've tried both and they have both failed. My internet isn't bad and I have no problems with any other downloads.
There are download links also on Patreon and Subscribestar, but I believe it is the same links as here.
What happens when the download fails? Any error messages? How are you doing the download?
Maybe try again tomorrow, sometimes there are transient errors.
Note that Itch.io app does not work for this game since version v0.19.x.
Trying again tomorrow should help with the too many people downloading thing.
In what way is Mediafire failing? If the download works at first but then cuts off, try continuing the download from where it left off. See instructions on managing download for your browser.
Also, make sure there is enough free space on disk, this game is 13 GBytes.