Hi & thanks for giving the preview a go!
We hadn't anticipated on people trying to play using the trackpad, so everything is tested with a mouse and keyboard. We did include controller support (I will update the ingame cheat sheet), however that is only tested with an Xbox 360 controller so far. You should be able to plug in the controller at any time and control the character with that.
The courtyard is to display your creations so as soon as you create multiple characters, they will all show up in the courtyard. You can also spawn random characters by pressing 'insert' while in the location.
Thanks for the feedback, and good to see you're on board where we want to take this going forward!