The thumbnails is getting a bit too crowded. The titles look big enough to be legible, however I would think that you should shift and enlarge yourself a bit, otherwise it looks weird compared to the game characters and out of place. When you do that, then you will have much less space and will have to shift things around, which will make the image even more crowded.
You could remove "part" just leave the #number, will have the same effect but will look much better. But you will need to work a bit more with the placement of everything and blending it all a bit more together. hope that helps.