How do I increase screen size without recreating the game

Hi there, am I able to increase the game size when uploading for desktop, please see the link as an example of the game.

http://www.scirra.com/arcade/action/16763/woolly-jumper

This was created for mobiles but I would like it to be a bigger size on scirra arcade.

Thanks

This Tutorial will help you with your situation.

https://www.scirra.com/manual/43/layout-view