Just download it from google. Mega turned into fucking trash+scam, so I see why you can suggest that, but downloading at 100MB/s isn't as big of an issue.
The issue is not download speed, it is about organization & version control, one reason Steam is so big is that is a central hub for most of our games, easy to install, keeps our games up to date, and even stores saves in the cloud, my hope is that the Itch.io app could do the same, in this case, what I want is auto-update feature.