feature: better controls for moving and accessibility

[bragerosberg]

Why
As of know the only controls are: Left & Right arrow, and Escape.
The "universal" keys to steer movement across the majority of games out there, it is most commonly with WASD, followed by arrow keys. In addition, whenever one might want to restart the user playing often wants to try buttons such as R, Enter, Esc.

What

• Add option to steer movement from WASD in addition to arrow keys
• Add option to restart the game with R