You have some really nice parts in this song. I particularly liked the part starting around 1:41. In general I think the hardest thing about experimental songs is differentiating between something truly experimental vs. something incorrect. For instance, the effect with the delay feedback at the end was definitely interesting, but I could hear it switch on with a little pop and I felt it didn't really accompany the song well. Also, I feel that even though the original song was minimal and sparse and that's probably what you were going for, you could have done a lot to add to it with some extra layers like a nice synth pad or some glitch drums, even something quiet and consistent in the background can really go a long way. You did this somewhat with the field recordings, but overall I think you just needed a bit more supporting elements to tie everything together rather than sounds scattered around the composition. I could really hear the potential in the part I previously mentioned at 1:41, I just wish it was fleshed out a bit more.
Hopefully that all makes sense. Your song definitely has potential and like you said it was pretty experimental, but I personally think that experimentation can be accepted more in music when it is contrasted against normal things.