Portals are the only way you can visit another players' realm. When you build a portal you must pick a direction (either to the player on your left or your right). This is one directional in two ways...you can only use it to visit the player you built it towards and that player cannot use YOUR portal to travel backwards through it, they must build their own!
We do not want to alienate anyone who purchases the game after kickstarter with exclusives but we do have some great upgrades planned that we cannot add without the SG funding. These upgrades will enhance the playing experience for anyone who purchases the games during or post-campaign. As we are a small company, it is very likely that a lot people will not hear about this game until after the campaign is over and we want everyone who plays it to have the same amazing playing experience!
I will not be selling the Art Prints outside of the campaign. Nolan may be selling prints of all of the artwork he did for this game at convention and anywhere else he so chooses, but it is totally up to him how many and when he decides to do this! All I can speak for is myself and I will NOT be selling these after the campaign concludes.
Don't see the answer to your question? Ask the project creator directly.