Click on the window and then press 1 to disable rotation (there's currently a bug where the starting angle is 45 degrees) press 3 to disable the other degree of tracking (use 2 and 4 to enable them again) the back ground color is part of the sprites/images you provide to it (located in the main folder) so to change the background color you have to change the background in those images (good news tho if you don't plan on using tracking you only need to replace 3 images. Check the description for some quick instructions on that) and finally that closing bug is known but harmless