Yeah I'm not sure about this one. At the very end of the cover I feel like you got to an interesting place layering the sounds, but I feel like otherwise it's missing a purpose.
What were you thinking about while making this? It feels like the sort of song you end up with when your goal is just "I'm going to make a song", rather than for example, "I really like how Fallen Down expresses expresses the empty sadness of defeat, and slowly adds a bit of warmth, as if trying to tell you to stay determined. I want to try to do that, but a bit better."
It _is_ possible to make cool songs by just setting up a pattern and playing with it in interesting ways. However, I feel like any song is going to convey some sort of emotion, if only a lack of it. Thinking about how to convey emotions in songs might be the next thing you need to do to improve your music. Also remember to think about the stories that a progression through different emotions can tell.
To me, the cover sounds slightly happy most of the time, maybe if you accentuated that, you could say something about how the original might change after a good ending of the game.
Anyway, it's always good to get stuff like this out there, so you can look at it (and have others look at it) from a different perspective. Looking forward to what you do next!