Thank you very much to both of you! :)
Luis Hernández: I'm happy you like it. Now that you mention it, you're right, but it's how I conceived it, haha. :)
Monarcheon: You're right, bars 55 and 57 are unplayable; someone pointed it out to me yesterday. Regarding bowing, I must admit it's something I'm struggling with and find it a bit difficult to get right. As for the last line, what about this bowing? (attached image). Apologies if it looks stupid or naive; I'm just a beginner, but I'm eager to learn.
Please take a look at my revised version (attached) if you have time. I've also changed the voicings in bars 29-32 to have one "grip" per bar, as suggested by someone (I wonder if it's because of a stylistic reason or because of playability?) and changed the final 6/4 chord for a single low resonant C, as I've been told it's more effective (which I agree with).
Thanks to both of you again for your feedback :) It's really valuable to me.