Explore a little bit more of each level of the two levels, there may be something you can active ;).How do you unlock the secret level?
And about the enchantments: can you reset the possible effects before you put points into the weapons / armor or is the effect fixed?
Once you choose an enchantment on a weapon/armour, you can't go back.
Played a tad bit more (I salvaged everything):
Playing the levels again on a higher "difficulty" shows even more randomization of the levels. As was stated a couple posts up, there are parts of the level you will always see, but there's a lot more that's generated/randomized. The higher the difficulty, the bigger the level is (in my experience).