There's a lot I like here. The reversed (?) chords are great at making the whole composition sound very ominous, and it manages to give it some forward momentum as well. Perhaps I would've preferred if there was just some extra percussive elements in the same vibe to fill it up but that might just be me. The flute-ish instrument sounds good, but I feel like that section around 0:44 is a bit jarring and the melody seems a bit random there, I personally felt the piano that came in afterwards was much more interesting and carried the piece along much better, which then ends up being complemented nicely by the flute afterwards. Good job on this though, it's certainly an interesting experiment that manages to elicit some good tension.