Hi Amsuko, Yes you may, my reply may be a little late though?!
May I use this in my Minecraft texture pack for Halloween? I like to make just a few little changes to give everything a holiday feeling. I've been looking for some pumpkins to replace the flowers, and this has a great mix of cute and realism and slightly spooky. It would be for personal use, but possibly shared with friends. Also, I'd have to edit it slightly to make it match other textures better - just tone down the black outline. I think the black outline works fine in this piece, but I'd turn it to dark orange and dark green (stem) so it matches other items better. Let me know if you're okay with any of that, thanks!
It's quite nice, I like your color choice on the pumpkin
Jedzed - It'll just get added this Halloween, then! Thanks!