I was skeptical at first but this was truly great. I love the artstyle and the character design of Jim !! He looks great the eye movements are an amazing addition, I was just thrown off because of the 'start game' illustration, he looks way better in the game and I think your artstyle might've improved during the time you drew him for the illustration and for the game sprites. I would recommend making new art for this screen as it makes it seem the game's art is not as great as it truly is.  This is great keep it up, I will play the following days !!