UPDATE OCTOBER 15th: The game is now officially in beta. I've had one tester play through the whole game and got very positive feedback. He did find one issue with one of the boss battles and also a couple of very minor issues. I will send the whole game to other testers in the meantime.
He also recommended changing the character movement since when you turn around Vadine seems to stop. I increased the acceleration and decreased the speed to improve character movement.
I can't wait to upload a new version of the demo to my page (I will do this after I get feedback from all the testers)!