User blog comment:Rainbowunicornsniper/RUS's Seed Review/@comment-4588951-20120613194955/@comment-5175478-20120907220409

The so called "burning world" bug has been fixed so nyan is a perfectly acceptable map. I do not suggest playing in survival as hostile mobs are infinite in the multiple caves present. However, survival is a viable option in peaceful mode (no zombies, skeletons, spiders, or creepers). The lava looks really cool at night. Again, only attempt "nyan" in survival in peaceful mode or if you would like a challenge. Since the latest update (4.0), health doesn't regenerate in normal survival unless you eat food so the plethora of monsters is VERY deadly if you are not prepared