A bit strange that you are introduced to aiming with E when doing so makes it hard to aim.
ALSO, remember that there are, in fact, players that still have 16:10 screens.
Your UI elements appear onscreen a bit for me and transitions only get the middle of the screen. It's bit rarer, but it's important to remember that players are using incredibly strange setups. (Side Note: I recommend ensuring that this isn't an issue on square screens as well)