This sounds uplifting and quite beautiful at times. There's a fantastic main melody as well. The transitions are wonderful; I particularly like the use of piccolo and harp. Although the song has plenty of awesome moments, I think much of it feels too empty, and the great momentum that emerges from the transitions into the climaxes quickly diminishes. I think the song could benefit a lot from having more instruments, not just to make it sound more full, but also to help define the melodies more during the quieter sections. It's clear that you're not using high-end libraries, and it's most evident in the awkwardly-slow attacks in some notes of the melodies; at times the melodies' short notes sound slightly out-of-sync with the forefront percussion. Adding some melodic percussion, such as a glockenspiel or celesta, could help a lot with that. Furthermore, I noticed a lack of high-frequency percussion; I think a tambourine would work well here. Lastly, I think some parts could benefit from some bass fx, which is basically an almost inaudible note that provides additional warmth to give certain transitions greater impact.