Oh damn, I didn't know it is still that far away (September this year), I have been seeing videos on it's development for I feel years now (not that it is uncommon for games, I just did not know this hadn't been released yet). Awesome you are making games and with your son! I used to cover them for a portion of my life so now I stay away from them (yet, I use the Internet daily so it's impossible to not keep up in some way)

Edit: E3 2015 where it already looked so ready