Hello! The downloadable has been updated, you can play it now. I still advise you to not skip any levels though. Make sure to leave feedback if possible!
Godot seems to have been giving an error with deleted files. I updated the downloadable (again), if this doesn't work as well then I sadly have no idea to fix the problem.
I'm having the same issue as Flavore with the downloadable export (i.e. all levels appear unlocked, but none are playable). I did enjoy the first level and the fast paced challenges on the browser. I'll check back before rating ends to see if you've reuploaded.