The final edit and polish...
And some audio tracks added
Below: Premiere Pro UI, showing the timeline with sequences (directly linked to After Effects with the Dynamic Link option) plus some imported audio tracks.
I used simple adjustments to volume and included some audio transition fades...
All music was sourced from http://freesound.org and the authors below Proxima4, zxcvbn9, 150134 and j1987 are credited.