A small quality of life change where select is unfocused after choosing an option

[hiranyey]

So if you select snake game and start pressing W A S D, the browser selects one of the options from select again.
This is not ideal behavior because we expect our inputs to work on the canvas instead of the select tag, so you must click on the canvas to start playing.

The same case happens in the core_input_keys example where you need to click on the canvas to start accepting new inputs. 

The downside of the implementation:-
You lose focus from select element even for non-interactive examples that require some flag per example in the codebase which I don't know if you want or not