https://github.com/PatheticFish/smilebasic-mode
A SmileBASIC major mode for Emacs that handles syntax highlighting and indentation fairly well.
Should maybe work okay as long as you aren't avoiding whitespace or writing run-on lines, as indentation will break with colon-separated control keywords.
Related: for vim users try https://github.com/myu314/vim-smilebasic3-syntax
Syntax Highlighting for GNU Emacs
YolkaiCreated: