Menu: While the ticking clock has been used by maaany of the composers here (me included, in nearly every track...) I like how yours sounds ripped right off an SNES... this is a very cool opening track, and the blend of 16-bit sounding synths with piano, bass, guitar, etc. is very nice!
Save File Select: smart use of the clock here! You've taken the same ticking rhythm and utilized it in a completely different vibe. This track is fantastic-- pure retro vibes here. There's just something about File Select music. It has a certain vibe... teetering the line between chill elevator music and brace-yourself-for-adventure-music. You nailed it.
The Center of Time: very cool effect here with the fading synths-- and the clock effect at the end, leading into the next track? Spot-on.
Time Travelling: it's super smart to repurpose existing material in a new light, and that's just what you've done with the Center of Time chord progression! Now it's upbeat. It was also smart to add a little tag: the same chords repeating again and again can get boring to the ear, so having some new chords after 3 repeats was a good way to keep the music fresh.
Clash: quintessential retro battle music goodness. I can see that you have a good ability to keep the music fresh: while chords do repeat a lot in each given section, you change them enough that things don't get too repetitive.
The Culprit: the way the beat is not quite aligned with the ticking of the clock is so clever! Conveying character through music can be a challenge, and through the little off-beat rhythm, we learn that this culprit doesn't quite obey the rules.
Fateful Duel: another solid track! The synth runs at 1:10 are my favorite bit.
In all, this soundtrack is wonderfully cohesive, with plenty of diverse sounds, and an almost post-retro feel with the synths + traditional instrument combo. Are any of these instruments played live? The guitar sounds like it could be.
Fantastic work, and keep writing!