Good composition and vibe; I would say the instruments are producing some harsh overtones/resonances that sound a little tinny/metallic (like when a harpsichord isn't made well).
I might pan them too when they're at different points in space, and then play around with the reverb to help soften them. There are some plugins to deal with harsh overtones. There's an expensive one called Soothe, but I end up using a multiband compressor (in Reaper, this is ReaFIR set to compressor).
Stuff like this I would also be using a Midi controller to adjust it.
Track three, the mix is better when you do that bit with the bass at around the 1 minute mark. The composition here is also stronger.
When you reintroduce that theme at 1:39, my brain wants it to modulate/be varied/more developed in some way other than repeating the theme/being louder.
Overall good work! :)