I've updated the demo build with 1.4.

The following fixes were addressed;

Increased the Dragon Boss's health.
Patched the dialogue that triggered twice for Ruwiel.
Fixed the use of 'your' during Ruwiel's dialogue.
I replaced one of the essential library's for using dragonbones with an uneditted version as this sometimes caused a very rare bug where the game crashed.
I have removed the option to skip the tutorial, it is short anyway.
I tweaked the PIXI js with it, may address some of the 'lag' issues, may not. I cannot test this on my machine.