The text is a bit jarring. I'd go with a slightly less saturated, slightly less bright shade of green for the text. Personally, I can't stand and would never use a thumbnail without the game title on it. If I have to choose between two games based on the icons, I want to know what the other one is called so I can come back to it. There have been several times I've been rating icons and seen a game I want to play but I accidentally click on it without pressing play, and then it's lost and takes ages to find it again. Also, if the game is removed from FGL, I'd never be able to find it, like this icon:
It looks great. The colours are well chosen and the icon looks like it leads to a very well polished, good looking game. I can't find it anywhere. It's not linked to a game on FGL (original must have been deleted) and since the text on there just says 'CR', I can't google it to find it on a different site. Titles on the icons are an absolute necessity, in my mind.