My friends and myself at first, press Esc expecting to go back a screen rather than close the game out. A small suggestion I have is to have a window pop up, after clicking Esc, that you can either click exit or cancel.
Second, I have noticed that the sound when the game starts and a match finishes won't lower when you lower the volume in the settings. So it is very loud and obnoxious xD My suggestion is that that both volume levels be the same