Uploaded July 2026 | Updated September 2026, 4 hours ago

---

Get the game here: themariovariable.org/mario-forever/mario-worker-letter-worlds-series

World O is the second world of the series to be themed after nightland, after World I. I started to work with a bit more custom stuff here, like the Bullet Lakitu in O-1 and the darkness with Star Blocks system in O-3.
Pretty glad of the results back then.

---
Good places where you can find me:
• My website: themariovariable.altervista.org
• Twitter: twitter.com/MarioVariable
• Discord: TheMarioVariable#5264

If you like, consider supporting me a bit more by donating (completely optional):
• themariovariable.altervista.org/donate
---