Hey, I'm not sure why that's happening! Are you going through your library for things you own? if it's not showing up to download there, let me know, I can make you a DL link.
Ah, I'm actually not familiar with the app, but if you are able to download the game through your browser you can run it by just extracting the files from the zip and running the game application--it doesn't require an actual install process.
