This app was mentioned in 5 comments, with an average of 1.60 upvotes
I once spend a whole day trying to figure this out...without success.
I emailed the created of this app that it didn't work, and he wrote back that he will update it sometime with better speeds and compatibility.
Hmm.. Actually I think that app I linked, Might've been removed. All I know is the name is very generic like "Flash Game Player."
There is, a version of this that's still on the Play Store.
https://play.google.com/store/apps/details?id=com.vkrun.flashgameplayer
Are you sure you posted on the right sub? Anyway, if it's a flash game, you should be able to download the Flash file and play it with a Flash game player like this one