Paddle doesn't move when arrow keys are pressed in EDGE browser

Hi,
The paddle doesn't move when the left or the right arrow key is pressed on **Microsoft Edge** browser (version 42.17134.1.0). I also tested it on **Mozilla Firefox** (Version 63.03) , and it works fine there.

- [X] I have looked over the code of conduct, and the content of the issue is inline with it.
- [X] I have checked if this bug and/or feature has been already created an issue of.
