Beautiful, I enjoyed that very much!
Rather than trying a faster tempo, I think you can treat the pulse even more freely than you do - stay longer on the chords, go forward more on the eighth-note passages etc. This is supposed to depict some sort of (day)dreaming - a still, peaceful activity, but where all sorts of sudden emotional shifts can go on underneath the surface.
You play this so well, but I think experimenting with bigger contrasts is where you could find things to enrich your interpretation.