Paul, May I offer some advice...
I would change the sharps to flats at the beginning. It is essentially C Minor. Using the sharps will end up being confusing to a performer. Someone like me starts to play it and we get caught up in "wait, this is an Eb and an Ab, why is he using sharps?" and then get distracted. If you want people to perform your music, one of the best things you can do is make it as easy for them to read as possible. And that, in many cases, can mean "what they're used to". While this is an original idea, it's a "typical" kind of thing in that it's got some chromatically moving notes within some typical chordal structures. They're used to seeing it one way and if it all looks different it's confusing. If they start second-guessing everything, it not only becomes distracting to the performer, but they also make the assumption you don't know what you're doing. And with modern-sounding music that's going to be one more argument not to play it!
I'd change all the sharp notes to their flat enharmonics on the first line.
In fact, any publisher would.
Also, chromatics don't affect the octave so it makes more sense, for example, to have G and Ab in measure 2 together instead of G# and G natural. Otherwise, even they they don't alter the octave, you'd really need a lot more cautionary accidentals in there just to be clear.
Really, you could (should) go with flats all the way to the "a tempo" in measure 11 (where it changes to Em which makes more sense with sharps as it is of course).
Interestingly, you do go back to "C minor" at measure 13, so the first 10 measures being that way is right in line (and the G# in m. 13 could be an Ab as well and m. 14 could use all flats then that's all consistent).
I think you need to go to sharps as you did in m. 19.
The Bb in m. 34 could be an A# to no ill effect, and really should be.
Oops just saw the post above - but he's right - see how it starts to raise eyebrows when you use the wrong spelling?
Otherwise, I played through it and it's quite nice. You go through some nice harmonies with some nice moving notes in there as well as the little melodic idea that kind of ties things together. Typical "study" as you say and I think you're right on the money. It's not unlike something I'd write, but I'd spell the chords right
Not something I'd be able to record without some work though.
Is it Finale? Can you run a MIDI file or audio file of it so people can at least get an idea of the sound?