Nice job. I think of all the tracks I’ve heard so far submitted, you have gotten the essence of those old Western scores the best. The dissonances and sparse use of select instruments helps to bring those instruments and emotions to the forefront, almost like a character in the movie.
The live nylon guitar helps keeps things organic. The electric guitar also nicely played. The sound too much low-end room ambience however and might have fit better with a thinner sounding, longer spring reverb type effect. The whistling sound, great that it was big, but the sound is hard cut/clipped at the start and should be ramped in. The flute whistles have a great haunting sound. Some nice melodic ideas with the dissonant trumpet. A bigger verb might have smoothed that sound out as well as some of the changes between instruments and sections. The track kind of looses steam about half way through for me and might have been stronger if edited down. Good work overall.