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The Play icon can be sort of hard to click in List view. I tried in Grid view and it seems to be easier to click for some reason. It seems like the blounding box in List mode is not consistent, as in you can hover the bottom part of the Play icon on some games and it wont click on it, but instead go to its details.

Overall I think the clickable part should be bigger, there seems to be plenty of space around and there is no need to be fumbling with the mouse on a tiny icon just to play a game.