This is Lapse (my Lisp dialect) interpreter.

Examples: here

• Go to this page
• Click on latest successful action run (or run from specific tag)
• Find an "Artifacts" section and download version for your OS. (If you can't see download button, log in to your github account)
• Unzip this artifact and you will get an executable of Lapse interpreter
• To run some code, write this code in ".lp" file (in fact, extension does not matter) and run <path-to-lapse-interpreter> <path-to-file> command in command line
• (You can find example files here)
• Also, Lapse provides a clean REPL by <path-to-lapse-interpreter> command