Recently, I made a thumbnail for Zombie Task Force and tried out a ‘diagonal split’ to demonstrate their two new modes within the game. I would be interested in hearing what your thoughts are on this style as I personally haven’t seen it been done yet in other games.
Looks great! Since thumbnails are smaller, I would just increase the size of the text for the different modes but if it’s for the slideshow on the game’s actual page then there’s no problem whatsoever.
The lighting is nice and it is overall well done, but the composition needs some work. It doesn’t follow any composition rule and it is hard to keep track of the scene and it is not directing your eyes anywhere.
I think, you are thinking of the game icons, that are 500x500 px (i believe?). But I’m pretty sure, that he means the thumbnail, so the big preview when you are on the game’s page.