Today's Free App of the Day is Magic Marble In Space
This is a platform game where you tilt the Fire to move the marble from platform to platform which apparently changes the music. Looking at the reviews, a couple of the five stars are suspect, but there are very few one star reviews, so it's a middle-of-the road game. I picked it up to try.
3 of 9 reviews are four stars and above.
These apps are compatible with the original Fire and with my Fire HD 8.9" 4G. To tell if an app works for your Fire HD or other Android device registered to your Amazon account, click on the above link and look on the right side of the web page. Amazon will tell you if it will work with your registered device.
Also check out the other digital deals from Amazon, including great deals on MP3s and videos: