The download of the app doesn't contain viruses or any kind of malware. Qwasa.net developed 2+2 that falls into the Education Games category. The game has been downloaded and set up by over 1K users and the most recent update is dated Feb 22, 2014.
This application has been rated 2.8 on Google Play. Get the setup package of 2+2 0.12 that is provided for free and have a look at users' reviews on Droid Informer. The app is designed for Android 2.3.3 and above.