The launch is mostly screwed up by the dev forgetting to ship the game with the font used in the game.
Right now, given update is less frequent, I would say we're close to bug free
(Dev is pretty responsive, except on Weekend, so 👍)
Quote update v1.5.6:
"One player I know of has gone through I think almost all the content in the game so I have a better idea of remaining progress breaking bugs and will probably slow down bug fixing next week."