Thanks for the answers! 
Oy! You're doing fine! Keep making songs and trying to write what you hear in your head. After a while you'll start to form your ideal music, but it can take a while sometimes!
As for "more stuff happening", stuff as much as you can into what room you have. Also check out the expansion chips if you're feeling a little cramped (N163 is my favorite).
Here's some of my music, mostly written in FamiTracker: https://soundcloud.com/ypmid
More than being cramped my problem is that I'm actually not really... sure... of what should be happening, and on how to properly layer the track. I will definitively give a listen to your music though, listening to something "proper" made with Famitracker should give me at least a few pointers.
yeah, that was an excessively harsh response to a track thats not bad...
its a pretty simple song, but that can be good.. i think maybe a few extra variations on each part and a little tweaking of the instruments could make the difference (those square waves are maybe a little cleaner than they should be)
Yeah, that's a problem that I'm having, not being able to create nice instruments. Is there any tutorial anywhere to help or is it just a matter of trial and error?
Some variation in the volume department would help a TON. The volume column is really easy once you get the hang of what's happening. There's also a definite lack of bass, which makes the whole thing sound really thin. But yeah, basically what e.s.c. said, variation is your friend. Keep it up! Famitracker is awesome stuff!
I already got how to change volume of notes, altought what I'm not still sure about is what should I use it to exactly.
Will definitelly try adding a bass line