You can read how to resize an image
here, but the "Add image to post" option automatically gives you a thumbnail for the visual. Thumbnails are small with low resolution to begin with, so expanding them will not be useful.
I am looking forward to the game, but I wonder which type it will be: free-to-play or paid. If it's an FTP, I would not be surprised if it follows the system that Niflheim and Wizardess hold. It is almost like they are trying to retire the common old system that I found more preferable... in some games.
When we were discussing in Cafe Chat what hair colors these guys could have while the image was fully silhouetted last week, I knew that one of these guys would have red hair. Of course it ends up being the one with the most "fabulous" pose. Like mentioned in Cafe Chat, the game's title is too much like a generic block game, or room escape game.