I think your pieces were of super high quality. Gris is one of my favorite indie games and also one of the inspirations for my soundtrack!
1. I liked the sparseness of this piece starting only with a few instruments and gradually growing to a climax. The oddly time rhythm and panning effects made the song feel expressive and mysterious but not dark.
2. In contrast to the first piece this one felt very eerie. The use of the high and low registers in the piano made the first portion feel a little like a Ghibli piece. The introduction of the cello is where I guess the old man comes in. It has an air of danger and mystery to it at first but drowns out the eerie drone and leads to an solemn piano solo that feels reliving because of the lack of the drone. I really liked how this piece tells a whole story.
3. A nice floaty piano interlude. Always love it.
4. I liked the layering of bells and pittz, and the their little "tumbling" motion in 0:32. The strings sound really expressive and emotional. The first half seems to convey the excitement of reaching the end of a journey, while changing to an introspective mood for the 2nd half of the piece gives the soundtrack a fitting end.
Incredibly done!