The original spaaaaace stage song feels kinda weird to me. Like, the melodies are sorta awkward and not very fitting the Megaman in Space vibe. Your take on it made it really shine. That is impressive. You should do a remake of Starman theme from the NES Megaman 5.
As was linked above, I covered starman along with Uranus's theme a long time ago.
As for the spaaace stage, that was the second to last track that I finished, and I feel like I didn't do a whole lot with it; I couldn't really think of much to do with it. It's one of my least favorite tracks from the original game. Glad it turned out okay though.