It is pretty confusing that half of values are in items/per second and half are in seconds per item. Can you somehow unify it to have following values: a) amount of line-fills per second b) amount of actual items produced per second
Rename tl "level" to "Item level". Add info that lower line is "character level" or "progress to next skill". Make "Save game" also save auto-refining settings. Specify what is the needed level for retiring: character level or item level?
To whoever has mouse with variable sensitivity: make in-game sensitivity low, make physical mouse sensitivity high -- then you will able to aim. If you have low physycal mouse sensitivity, then when you're aiming, your aim will most of the time move opposite direction from where you move your mouse.
2stars just because of one of the worst decisions for the shooter game: make aim not follow your mouse moves. That is the worst you can do. If you want that that much -- then at least make an option to stop aim for about 1second or before you shoot.