Those social media companies are useless. Most of the 1000x followers they give you are either A - fake bot accounts or B - other accounts that signed up with that company (they will ask you to follow a certain number of client accounts in return). The only benefit it gives you is that large follower count, which make you LOOK more popular but that's it. It doesn't solve the problem of getting interested users to engage with you since the followers you get aren't actually interested in your game. Ignore these guys like the plague.
You don't need a marketing company to get on Greenlight. Valve is handing out Greenlight approvals like candy. Just put your game on Greenlight and wait a few months. It will get there.
Regarding Kickstarter... it's not the magical money magnet it once was.
The honeymoon is definitely over, and that goes double so for point-and-click adventures. The sad reality is that a lot of the "big" kickstarted adventure games were big disappointments, and the press isn't as eager to cover them like they used to. So you'd need to push your campaign yourself, and that's a full time job in itself. Which is why I don't do it. 
Anyway, your game looks fun. Good luck with it!
-Dave
You don't need a marketing company to get on Greenlight. Valve is handing out Greenlight approvals like candy. Just put your game on Greenlight and wait a few months. It will get there.
Regarding Kickstarter... it's not the magical money magnet it once was.


Anyway, your game looks fun. Good luck with it!
-Dave