as of gameplay and movement this level belongs to some of the best levels made, it has a great 'flow'.
Also, replaying it all night it didn't get boring at all, it's full action all of the time, with some spaces where you can fight duels as well. small tunnel adds a nice twist to it, you'll have to be quick in that one.
In the end it's gameplay that counts, graphics IMO are less important. The fact that this level didn't start with a theme means that everything is dedicated to giving great gameplay, and that worked out very well. I'd give this level a 9/10 for gameplay. it's better then levels like ore quarry (which i like as well).