hey, just some info on how OHBs work, if you were legitimately confused...
the OHB format is listed below the big OHB icon on the top left of the battle page. there will also be a "read more" link to the lyceum page telling about the format. this has info on what file types are allowed in the format. sometimes the bitpack will contain additional rules, sometimes samples, sometimes just a theme (as was the case with the OHB you entered earlier).
entering the botb chat (link at the top of any page) is a good way to ask any questions you may have, and it's also customary to join if you are participating in an OHB. plus it adds a lot to the fun :)
Thanks, I was legitimately a bit confused, since I thought I needed a specific chiptune generator to be eligible. Thanks for clarifying man. I'm gonna have to get used to the chat system though, feels like I'm about to watch a snuff film.