2 Tracks rejected. Help

Hello everybody! Help to understand what is wrong in this rejected track.

on fun adventure the marimba sounds like midi. i think that’s part of the no-no list but i like the tune though.

no idea on the other. sounds great to me.

In Romantic Happy Song the bass notes after 2:07 seem a bit loud and distracting.
I would also make the drums and the lead guitar a little quieter.
Sounds really good apart from that!