This is a beta product here are the steps:
Go to www.Flash.pm and click on Download button in the upper right.
Click the download button it will take you to the GitHub repo, here click the release button
Check for and download the latest Linux release:
After download extract the zip archive:
Then go to the extracted folder right click the FlashBrowser file and mark it as executable like so:
Than you have to open the terminal like so:
And type in ./FlashBrowser and hit enter
The URL Prompt will show and you can enter your favorite flash games website:
If there are users I will try to make installer add a icon and other issues take time.