Thank you for the response.
The game is Type Dreams by Hofmeier (https://hofmeier.itch.io/type-dreams)
I've got a few more questions if you don't mind.
Am I right to assume that :
1) Even when the progress bar restarts from zero when resumed, it doesn't necessarily mean that it's starting from the beginning (or re-downloads everything from the beginning) and merely resumes from where it had stopped downloading/extracting.
2) When it still displays 'KB/s - minutes' it means that it's still downloading, not extracting.
3) When I checked 'AppData\Roaming\itch\apps\type-dreams' there were files in that folder. Does this mean that these were the files that were downloaded, and will not need to be re-downloaded by the app again?