Fantastic work! I love the strategic use of drums. Makes your energy levels a lot more nuanced! Crazy that you were able to do all this on a phone!
You asked for feedback on the composition: I think your development through the first chunk is great, but the pacing of chords towards the latter sections gets a little slow and repetitive. Once you've introduced the pacing of those chords (even if the progression is long, or not strictly a loop), you have plenty of room to throw some extra melodies/decorations on top.