$ cargo run examples/fizzbuzz.omgrofl
See other examples in the folder alongside what I think is the first and only implementation of FizzBuzz in Omgrofl!
While writing a program it might be handy to dump out the variable/stack state or the syntax tree.
There are environment variables for doing just that
$ DUMP_VARS=1 DUMP_AST=1 cargo run examples/fizzbuzz.omgrofl
This will be one of the last remaining interpreters for omgrofl. To my knowledge there is only one other surviving mostly complete implementation here.
I would highly recommend writing another one yourself - it's a fun little language :)