I want to create a game and need your advise

I am trying to create a game (web-browser first; mobile at some future) and as I am going through different phases I have questions:

Could someone validate the idea of the game? Would you play it and why? If you would like to validate it I will explain more about it.
As the web-browser based game is simple (I think so), is out there any app to build a game without coding? It would be similar to Travian game. It is not a visual game where you manage your character and need any action. It is more like "completing tasks".