Hi and welcome!
I'm glad you like the script. There's nothing in 2.1 that would blow 2.0 out of the water, just things like article attachments, more custom fields, new custom field type (checkbox), an autologin feature, multiple languages support etc.
I really like what you did with your design, especially the "Crete New Ticket" and "Track Existing Ticket" buttons. Did you design the icons or are they from a set? Either way they look very nice.
I'd hate to be picky but I do have a request; the "Powered by" link mustn't be removed
or modified without purchasing a license. It's just that if I let you away with it why not everyone else. Since it still links to HESK website I wouldn't mind if you didn't post a link to your helpdesk here for everyone to see, but now...

Thanks!