Space to enter a seed. If you enter a nonexistent seed, it will generate a new random one. If you enter a seed that is not 6 characters, it will not do anything.
Smoother, more realistic generation. Now this needs turbowarp to run, otherwise it will lag a little (for most). Everything is completely randomly generated. No pre-made chunks or anything. Each seed is linked to a code, which is all of the information. Clicking the flag creates a new seed. One of my previous projects, a cloud list was used in this.