Here's Janek reply :
I'm sorry, but we don't have enough resources to manage another means of submitting scores. However, as written in the instructions, if you really don't want to use Git you can send us your submission via email.
I assure that using Git is the most professional way of collaborating possible, and despite its apparent unfriendliness it's worth learning (as we have experienced ourselves in a big, real-life project). At this very moment we're finishing a paper on this topic, and Urs had written several posts about it on "Scores of Beauty" blog (for example http://lilypondblog.org/2014/01/why-use ... ng-scores/
In fact, participating in this contest is a good opportunity to learn version control - we have spent *a lot* of time on streamlining the process and preparing a friendly user guide, and we're willing to help if you run into trouble.
We hope that later in the discussion of contest results the benefits of version control will become obvious.