The easiest way to download flash games available in game sites like Mini Clips, is by visiting FILE2HD site.

1- Copy the URL of the page where your flash game is located.
2- Go to http://file2hd.com and paste the copied URL to the appropriate box.
3- Set ‘Filter’ to ‘Objects’ option and click on ‘Get Files’ button.
3- Wait for a few seconds to see the URL of the game you want to download.

There are many other ways to download flash games to PC too.