You can run a program using RUN in direct mode or pressing Start, and save it by using SAVE "PRG:NAME" (or pressing Shift then SAVE in the top left in the editor).
another error I spotted is on line 105 and 106, return> should be return and save"BOSS:NESS"? maybe take that out? anyways hope i helped and we all start somewhere :3 if you have more questions ask me
also if you or anyone here needs trouble shooting ill be happy to help just send me your key to your program and ill patch it up and make notes 030 my kik is FreeForm98 for easy convos