A new version of NES Touch is available on Google Play Store for Android users. If you receive automatic updates, NES Touch will have been updated without you needing to do anything. To manually update, open the Play Store icon and go to the Home section (top left, icon has three horizontal lines), then go to My Apps and Games. Scroll down to NES Touch in this list, tap on it once, and then tap ‘Update’.
The following updates have taken place: