It starts off as Erik Satie's Gymnopedie No. 1 for solo piano (typical classical music with here and there a hint that something is going to happen)... and at 00:58 it transitions into Progressive House. At 03:23 the classical melody becomes primary again with small hints of House... and at 04:00 we have another reversal.
I love what Andrew did with this composition, returning once every so often back to the main piano theme. A gorgeous melody reflecting on hope and euphoria captured in this electronic reimagination.
On Spotify: https://open.spotify.com/track/300vqt4leRx1GrBo07i0vM