This is me playing through the entire game in Arcade mode using Snakeman.
I originally uploaded this video last year before Rmm's first release and only showed my run through to the Yellow Devil so I wouldn't show everything before the game released for the first time. Since it's now a year later here is the full completed video if your interested in seeing it. It's outdated at this point but still fun.
Original Video:
https://www.youtube.com/watch?v=Z5-hgEDEbk8