I think this could be a commercial success if you manage to get it on SteamIt's really quality , even more on last video i posted about the graphic side !
With some world maps and diversified difficulty ,easy to hard level , indeed it will be on Steam
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Perhaps the maain way to get on Steam is adevrtising a lot ??
A running demo published on Indie sites and PC sites , posting videos on sites like Gametrailers, Ign.com ... !
Or ask at people that made "Aahhahahahaha" 3DGS game , or
minecraft maker on it's forum.
But i'm sure Steam will be interesting, they have lot of great quality entertaining Indie games in tehir indie section