Interesting concept, the music rocks, and the nods to Super Metroid are a nice touch.
On the other hand, the game hasn't aged all that well: the tutorial has a few typos, the intro's voice over sounds like it was done with a text-to-speech app, and Ridley doesn't resemble his appearance in the official games.
I recognize that making a game is very complicated, especially when you're working alone. I wish you luck in all your future endeavors.
On another note, I love your SHIFT games.