I just received an e-mail from Adriano (aka ZoneGN) with this content:

Hi, an easy version of Uranus Zero is come.The game is called URANUS ZERO EV (EASY VERSION). Don’t forgot to make the mondial best score and put on the high-score web site.I also announce officially that I would not make any more”free”games for the gba. I am very occupied with other projects…ZoneGN.http://www.zonegn.comhttp://www.pocket-dev.net/zonegn

You can get the file either from the official page at ZoneGN.com or from PDroms.http://www.zonegn.com/