Saving it as binary should produce a working program (it has proper startup code etc).
Just don't ask me how to save it, last time I used SEKA&friends was something like close to 20 years ago :-)
BTW these aren't the best sources for learning as they're resourced + fixed versions of the original. Sometimes large cryptic code sequences might go unexplained and so on. If only possible you should find original sources, those often are the most readable and sometimes might have better comments. Unfortunately original and well commented sources are probably very very rare.
