Thank you for the comment about the fullscreen. This is because I had set the dimensions manually myself without realizing it would impact the ability for fullscreen to adapt to your aspect ratio. This was a simple fix now and it should launch in fullscreen when you run the game (and stretch to your screen's aspect ratio!).
This is a game I'll likely continue to pursue in the future so you can bet the gun will have more impact in the future!
Thank you for playing and commenting!