Pix64 v1.1

Howdy,

I'm glad to release a new version of the Pix64 fantasy console. Beside several fixes it introduces support for multicarts.

Mandatory changelog:

* Play: Improved player movement direction switching.
* Play: Blocked moving clusters don't flip forever.
* Cart: Improved tutorial.
* Menu: Added support for multi carts.
* Menu: Carts with long name are fully displayed using scrolling.
* Menu: Improved menu navigation.
* Menu: Added missing sfx when going up.

Enjoy!