I really like the colours and the design.
But there are some points to change.
I am not happy with the mine car position. Maybe you could arrange it in a different way. If it is not possible to integrate it well, it is better to remove it.
I know it is more work, but the silhouette I've drawn and added to the documents combines the most interesting buildings of both cities (Essen and Dortmund). You can arrange them as you want, but you should use them.
Last point...fingerburns fire in the background is a little bit more agressive. I like it a bit better. Could you try a similar fire? Would be great.