Yes, tozer0 is the original game (you can find the link at the end of my webpage on zer0.io). I'm in contact with the dev of tozer0 since the beginning of the project to let him know about it and share informations ^^ !

With zer0 I decided to use this gameplay to create a more addictive and well designed game. At first it was just a test with Unity3D, but finaly I chose to spend some time (and money) on the project in order to create something with a good quality, for the web and for Android/iOS !

I have learned many new things with this project already !