I agree with the review below, this does sound like something from crash bandicoot, which is a plus because I love crash.
Okay, time for the R4R task.
Likey:
1-) That part at 3:51 feels really good, I definitely see that as the soundtrack of a water level.
2-) The percs are lively and charming, they definitely help imagine a scenery for this.
3-) This sort of... "hype" fast-up beat I'm not fond of, but here it fits really well.
Not likey:
1-) It is a little repetitive for my taste, but that's my taste.
2-) The chirping birds and environmental sounds are good for the intro and end, but in the middle I don't think they are needed.
Overall:
This is a good track, great for a platforming game or something similar. Effort went into this. Keep it up, buddy.