Hey dude!
Sorry we didn't get around to listening to this until now. Been a little busy lately..
Anyways, I liked the initial theme and melody, it's pretty catch and it's definitely something you'd hear on Adventure Time. However, at around :15, the second synth came in. I don't know what you were intending for it, but since it sounds more like a background/support kinda thing, it seems a little bit too loud for my tastes.
Loved the bass. That was fantastic. My only other question is if you meant for the beats to remain consistent the entire song. Everything else was great, but the beats got a bit repetitive for me.
Keep up the work man!
-Autumn Collapse