What a fantastic experience, it took me a bit less than 12 hours to complete on my first run, the exploration was top notch and well built for handheld. The puzzles and progression was fantastic. The metroids are fun to beat and when you get their patterns you feel great. The added bosses are pretty good, a few comebacks and a great new boss. All of them with great level of complexity, all of them took me quite a few tries to beat, but man did it feel good once I did so. I loved it.