Good day. I heard you wanted a review.

DA GOOD:
-Fairly good sounds, considering this is with a sound font.
-Also considering this is with Mario Paint Composer, holy crap man. You need to get a better system for making music, seems like you could do some really good things.

DA NOT-SO-GOOD:
-Ok, first of all - you might want to give this a bit more of a consistent tune. As it is, the composition is a tad random and monotonous. There are a lot of backgrounds that seem rather copy/pasted, and there's no particular "tune" that sticks out. If you listen to some higher-quality songs from artists (even pop music would do), there is always some kind of 'chorus' or general tune that they keep to. In classical format, there are generally two or three tunes. You also may want to try changing the chords every once in a while too.
-Try using some more natural changing of volumes, as well as bringing out of the less-easily-heard percussion. In MPC, I don't believe you can really "mix", so I can't talk much about that, but... at the very least, like TroisNyxEtienne said... volume control.

Keep working at it! Even though this isn't that good of a song, I do see potential - try looking up Anvil Studio or MadTracker. They're free DAWs that I've heard are quite good - though I have not used them myself.

-Swint-

Sounds pretty decent, although it feels like its missing some stuff. I can't put my finger on it though.

Hello, fellow Mario Painter. :D
A few things to note:

1) Volume control. You've got the green bars below to regulate the volume; try making use of them. I understand that this is your first song, and like you, I did not make use of the volume control when I made my first Mario Paint piece. But you'd do well to remember that. ^_- It especially shows in percussions when the drums are all the same volume and don't sound natural...

2) Chord variation. The piece sounds a little bland when the same chords are repeated all the way through. Try a little more variation! This, if not anything else, is the aspect that gashes the listening experience for me.

3) Buildup. You built up the piece well with a bit more instrument layering in each section. Also, the intro was quite good.

Congrats on your first song -- build up on what's good, knock out the kinks and you'll be well on your way to making better pieces!

I really love it :) Hit me up :)