Please keep in mind this is a pre-alpha release. Yes, you can fall off the edge of the world, etc.. If you mess something up beyond repair you can delete your save file and start over. Also each major update and any weekly updates for the next month or so will have a fresh save file.

Search for a file called: save.v032.TylerIsAFK.dat

Location on Mac OS: Users > 'UserName' > Library > Application Support > Firedanger > Legacy

Location on Windows: C:\Users\'UserName'\AppData\LocalLow\Firedanger\Legacy

This is only for the time being. A save reset will be implemented before long.