Hey thanks a bunch, I'm glad you like it!
I've figured out the problem with the output process and checked it out. I've found that the loop seems rather abrupt after fixing it, so I'm gonna add another 5-10 seconds to it today to solve that issue.
My approach to SFX design is to actually just keep the harmonic sounds (That being, the ones that actually have an understandable pitch. Chords, small melodies, bleeps/bloops, etc.) in the same key as the music; inharmonic sounds are just the opposite (Swords clashing, metal, wind, etc. for example), and don't necessarily matter where they are placed. To get the sounds, I just program one of my synths. I have a pretty thorough understanding of them now after several years, so I can create/re-create just about any sound.
And I'd more than happy to carry out those sounds for you.
I think that would be quite an interesting mechanic, definitely making it more difficult for sure. Have you thought about adding other modes to it? Such as maybe a time-trial mode where you race against the clock, for example. You've definitely got a great head-start for an exceptional puzzle game. And, as always, if you were to do that, I'd be happy to make more music for this.
Oh, quick question, after this project is completed, would you mind if I actually made a post about it on my website? I'm trying to show off some projects I've worked on to actually gain more work, and this is an awesome one. Just let me know