The final track is out and ready for all!
Still chasing down some minor issues with track 20, but hopefully we'll be able to get those resolved.
For now, enjoy exploring the new track, and once you've beaten track 20, you'll have unlocked the Champion ship to use on all tracks!
From this update, there'll be no further substantial updates, though there may be some additional bugfixes if we can get to the bottom of the issues with track 20.