I just played the prologue. I loved the unique game play mechanics, atmosphere, and writing. It will be interesting to see how you expand the game. However, I dont feel like its comparison to metroid is accurate. At least regarding the gameplay.
Thanks! the metroid connection is really about two things, scanning, and the main game's wider world. Think of this prologue like Metroid Prime's opening space station sequence, it's a linear introduction to the game, but after it is finished the world opens up. Expect something similar in the main game.