It started out very calmly with a slow buildup, which I thought was nice until 0:15. Then when it changed up at 0:30 it turned into a completely different song. Another problem here with changing up the sounds to make them sound good together.
Then it happened again at 1:31 and at the very end of the song. You really, REALLY need to work on your transitioning, I can't stress that enough. You do make some good sounding music, but it still needs a lot of work. Just focus on improving.
P.S. A suggestion, if I may, the song before 0:15 sounded absolutely majestic. You should make that into a song of its own and keep the ambient sound throughout the whole song, don't make any transitions that turn into a techno song or whatever else. THAT would be a great song. But like I said, just a suggestion.