For a complete look at all 12 puzzle stages and every story beat, check out this 100% completion guide:
While the platforming can be difficult, completing all 12 stages isn't strictly required to finish the story; the narrative will continue even if you fail. Stage Guide & Tips GOODBYE WORLD Switch NSP (eShop)
You can only place as many blocks as you have currently "picked up" or destroyed from the environment. For a complete look at all 12 puzzle
The game is linear with a single ending, but you can replay stages via the "Title Screen" after finishing the main story to clear levels you missed. GOODBYE WORLD Switch NSP (eShop)
Follows Kanii (programmer) and Kumade (artist) as they struggle to create a successful indie game while working part-time jobs.