Use X to change settings. Spacebar to start. *Note! using X during generation WILL stop the process!* You may have to hit the green flag again after changing the settings. They will not reset.
I made this cool map generator, I wasn't planning on implementing all the features that I did but I kept thinking of cool stuff to put in! It takes a little time but it's worth it, It's got beaches and trees which can be turned on or off, as well as 3 biomes, grass, desert, and ocean,which can be made more or less frequent as well as being turned off. My personal favorite settings are already entered.