I have two songs I recorded to cheapo cassettes using my Tascam 424 mkIII. they're okay. I just bounced the Gameboy part in mono to tape and added instruments and vocals afterwards because I knew syncing the tracks would be insane. I thought they were pretty cool until I tried to record the same songs on my computer along each channel and I just realized that it didn't compare at all. Granted, I felt rushed for time and I just wanted to get through the recording session; which is not a good mind set to be in with a project.
Thinking back, perhaps a good idea would be to split the percussion and the melody parts via panning and then you could have a little more control over the mix. I apologize if this has already been said before, this is my first post.
Tape is fun, but super impractical.