Blackjack is fun, I have that plus three word games. Games from Amazon have "Amazon Digital Services" as the author, so you can find those that way. Once you're on a game page, there's usually a "more things to try" box to the right with more games listed, as well as in the "customers also bought" section.
Most of them are also tagged with "Kindle Active Content", so you can tag-browse for that. Currently 28 items have that tagged and here is the link:
Kindle Active Content