I wrote the song on the OP-Z without listening to a single sound. I programmed a chord progression and tried to add elements that would fit the song. The presets for different instruments were chosen from memory, though now that I think about it I should've chosen randomly.
Hopefully this is not too bad! I'll listen for the first time after someone has commented on it. I expect the song to be OK because I played it safe and stayed in my comfort zone... I might do it again using random presets and taking more risks.