Remember my BlackBerry app to learn the Japanese Colors? I have submitted it to the App World, but it hasn't been approved yet. Maybe RIM it's still busy approving the thousands of PlayBook apps that has been submitted last month to get a free developer device.
Meanwhile I ported it to Android and published on the Android Market Google Play. It's an easy game, but it's lightweight and I think that in a few minutes you will know the most common Japanese Colors.
Ps: did I mention that it's free?