1 hour ago, Talynblade said:... I could not get the link to open up the game ...
https://github.com/Sandrem/FlyCasual/releases
If you use Windows, download "Windows.zip"
Extract contents of the archive to any folder.
Find inside "FlyCasual.exe" and launch it.
If you don't see exe-file then check your antivirus (maybe it sent that file to quarantine) or try to re-download zip-file.