Hi Gryfyfy, I'm sorry you had that experience. I don't believe the demo was meant to support the PS4 controller, which is why you were probably having that difficulty. If you're still interested, have you tried the keyboard + mouse or keyboard only control options? Those should also be playable for the demo!
As for the European eShop release, we're working on it but unfortunately I don't have anything to announce right now! We're operating with a very small team and almost no budget currently, so we aren't able to get these things going as fast as some of the indies with big publishers are. I would hope you at least get a chance to try us again in the future, whether with the keyboard or if/when we announce an EU switch date!