In order to reach a larger public, I put Newton Adventure on Greenlight with the help of Stuffomatic.
Greenlight is a section of the popular distribution platform Steam. Player can vote for games they want to be accepted by Steam.
The Steam version will regroup the free base game, the paying mods et integration of some Steam features (achievements for example).
If you are interested, check the Newton Adventure page on Greenlight.
(NB: while I am not a fan of this kind proprietary software closed distribution platform, there is so much people on it that getting on Steam is quite mandatory to get your game noticed by a lot gamers.)