A NES couldn't play something like that if it has 7 channels (?)
Let me see... It has 4 Square Channels and 2 Triangle Channels and of course a noise channel?
I don't know how you made those sounds don't overlap each other and don't look like they produce weird noises. Nice job! Not that I'm an expert or whatsoever, but you are! I love how it sounds, too!
No--It couldn't. These days I label my songs as (NES) instead of (8 bit) if they're specifically using NES limitations. It was a very weak console for its time, audio wise. A lot of other 8 bit computers, such as the Japanese NES (Famicon), could play this tune, though.
I like Puyo Puyo and Madou Monogatari series. Not a dedicated one, but I still love those characters and playing Puyo games. I didn't know of this song. But I also love 8-bit tunes. It sounds so nice!
Just like a NES should sound. I'd like to learn how to create my own chiptune sounds. Yours are so clear. Did you use triple oscillator?
Oh no. I have a VST specifically for emulating the NES's sound chip, aptly named NES VST 2. This song is from one of the many spinoff games. c:
Mismi here! I'm studying audio engineering and animation. I like videogames and martial arts, too.
Age 36, Male
Student
ESCINETV
Caracas, Venezuela
Joined on 7/10/07
Creator of Puyo Puyo Hell (8 bit) 
Comet Summoner Witch (NES)