Thank you for bringing this to my attention. I did suspect that this might happen on a 16x10 aspect ratio monitor, and have been working on possible solutions. Hopefully I can get an updated build up soon.
I did manage to upload a new version of the game this morning. Unfortunately I was unable to eliminate the black bars you are experiencing, as they are set by the camera's aspect ration, but I was able to adjust the UI elements so that they are now constrained to the camera view only.
