Technically, very good. It's a hard etude, and you're playing it very smoothly.
But you're also playing it all at the same dynamic level and "tonal quality" (pardon me for using this phrase). Try increasing the volume as you go up and decreasing the volume as you go down. Also, put more energy into it as you go up so that there is an exciting climax at the top of each phrase (this is not the same as dynamics).
Also, layer the dynamics (and tonal energy). So every two bars shouldn't sound exactly the same. Maybe the first sections should be loud (well, like this: loud < very loud > loud) and then the next sections might be softer (i.e. soft < a little loud > soft). Also, layer the dynamics within a section. So maybe in a particular section, the first run up and down begins and ends, say, f, and climaxes at ff; and then the next run up and down starts and ends at ff and climaxes at fff, and then the next run up and down begins and ends at fff and climaxes at ffff, and then the next run up and down is back to beginning with ff, climaxes at fff, and then ends at mf, sort of leading into the next section which might begin mp or mf.
It's really very good technically, and I think it could be a lot better if you try to incorporate a lot of crescendos and descrescendos, and organize the piece musically so that certain sections sound differently than others.
