Right now, I'm still missing the Stage 1 boss theme (which has been giving me quite the headache, actually), but it's the only thing missing before the whole thing is ready for a potential trial version. And after that... well... Once I got those first seven themes, I won't be updating that playlist to keep the playing experience for the full version as pure as possible. You few people out there who are regularly getting WIPs (you know who you are, you lucky bastards) are most likely going to continue to, especially my fellow musicians. That constructive criticism is certainly not without its value.
For the rest of you: I hope you can cherish what little you'll be getting from here on out. Do look forward to the game's release sometime in the not-so-near future.