Like Kale mentioned, the bass overpowers the cello a bit because of its power.
One thing that might work as an alternative arrangement for this, is playing the bass part on the lower register of the cello, the upper part higher on the cello and then later maybe adding some plucked bass to give power to the low end, but not to overpower the cello (just a quick idea I had, not sure if it would work😅).
But other than that, good job!