It's a nice song, I like it! yes, very different indeed. Key change was cool, and you kept me interested with the percussion and main theme.
Some things you could improve on though is changing it up a bit, you don't want your listeners to get bored don't you? I would say you had the perfect chance to do this at 0:40, you could have introduced another melody or something. Another thing...the piano thing at the end was a kinda...meh...it was weird and loud. Either use another instrument that fits more with the song's mood, or just cut it at 3:08.
But yea, you definitely know what you're doing, and I hope you get somewhere by doing this music stuff. Tough place to be, but you have promise. Look forward to see more of your stuff, you just earned a follower my friend.