Below I think out loud about the chord sequences, in the hope that if you find yourself noodling around and doing some improvising yourself, you might find some patterns that sound good. If they sound good to you, you should use them and make your own. They constitute what used to be liner notes, which used to be inserted into physical albums and could contain anything from printed lyrics to profiles of musicians, to background notes on the album and various tracks. If nothing else I hope these notes can encourage you to try some of these sequences for yourself and carry on your own journey of improvisation and create your own music.
Track 02 - One Four One Five One
C C7 F Fm C G C
In keeping with keeping things simple, start with (mostly) white keys on key of C. C7 has a Bb, Fm has an Ab, but otherwise the chords are all on plain white keys.
Am C D F Am C E7
Improvising over the chords to "there is a house..."
Track 04 - Slow Andalusian
Am G F E7
This is a very common and popular chord sequence, often called the Andalusian, as in Spanish music. If you play them quickly with a lot of strumming the sounds jump out as very familiar. I like to play them moderately, as with the other tracks on this album.
Track 05 - One Three Four and a Four Minor
C E F Fm C
Starting in a major key, the Fm change to minor gives a nice tension that resolves to C, coming home.
Track 06 - Slow Meditation
Improvisation over chords to Morning Has Broken.
Track 07 - Seventh Universe
Am Dm G C F Bb Bmb5 E7
This might look complicated at first, but looking at the overall structure, the underlined series looks just like the Andalusian sequence. It's merely decorated with some transitions going in their own way: Dm C Bb (one step down in each change). The Bmb5 is almost like a Bdim before it arrives at the E7, ready to circle back to the Am.
Track 08 - One Three Six and a Five
1 3 6 5 is another notation for C E Am G
If 1=C, then 3=E and 6=A(minor) and 5=G or G7, ready to close the loop and go back to C.
Track 09 - Lost in the Waves
Am E G D F C Dm E
Looking at the underlined chords, it's another variation of the Andalusian series, with a different decorative track inserted in between, E to D to C (one note down at each change), and a Dm to produce a bit of tension before going to E (or E7).
Track 10 - Six Minor Four One and a Five
Am F C G
If we look at Am as 1, then the sequence is 1-6-3-5, and it's Track 08 taken in a fresh order.
Track 11 - Walking up One Through Six
C Dm Em F G Am
Each change is one white key up from the previous one, like climbing the stairs a small step at a time.