Today's Free App of the Day is Game Dev Story
Originally $2.50

From the product page:

Manage your own game company and try to create a million-selling game in this unique simulation. Features the ability to develop your company's own game console, plus a system for changing your staff members' professions.
Your staff members can have a variety of game-related professions, from programmer to sound engineer.
Work hard and you may reach the top of the video game industry!

This sounds more interesting than it is. You are a game developer with a small staff. The little 8 bit characters don't bother me, they're kind of charming. But there's a lot of waiting around for things to happen. You choose various parameters for each project--how skilled the staff is, what kind of game, who is going to design it, and what happens then is mostly out of your control. Your staff comes and goes every day, but apparently you and your secretary work 24 hours a day. Occasionally, one of the employees bursts into flames for no apparent reason. It's okay. Not enough of a tutorial, though there is a manual accessed under the Menu > System section. I recommend reading through the five star reviews to gain tips. It's okay. Three stars for me.

65 of 70 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.

Have fun!

Also check out the other digital deals from Amazon, including great deals on MP3s and videos: