I got the game on steam and I loved it from beginning to end. Now the idea of implementing the walljump in Metroid a la mirror's edge is great. I can't believe I didn't think about that. Still, I don't really hate the Metroid Prime method, the only problem was the game loved pointing out the obvious surfaces, you should really be able to use it in any facing surfaces that are somewhat flat.
Actually, I loved the power so much that I overused it a lot specially in boss battles, and against emperor ing it was pretty amazing, sometimes you collided with the emperor in the right angle which made samus bounce dramatically, almost touching the ceiling, it was pretty epic.