"Beakortolaris" is, in my opinion, Cerror's best chiptune. It's happy, light, whimsical, and has a very strange written comment section within the source file that states thus: "1) a bird 2) made up 3) weird 4) but intriguing 5) email@example.com". And wow, what a title.
It's an XM file, playable with ModPlug Tracker, etc. Ten samples, twelve channels. The non-chiptune drums work along lightly with the bassline and lead.
It was used in the freeware computer platformer "Purple".