It is definitely nice to see someone actually using Unity properly, and making something that works. It is obvious you have put quite a bit more work into this, but I would suggest continuing on it after the contest. Add control options (the movement speed was stupid fast for my track pad) and maybe improve core functions (like shooting, and field of view - sometimes it felt like the world was scrunched in.) Reminds me a lot of Tribes, keep it up!
A lot of the kids commenting here don't realize that your voice acting and dialog sound is a throw back to old console RPGs where the dialog was compressed into 8 bit files for RAM storage.
"if you have nothing good to say about this application, just don’t say it." This is a website for games, not 'applications'. Go back to new grounds or something.
Spring jumping is easy, just keep in mind that the your apex will be slightly lower than the height of your original jump. Knowing this, even getting that diamond on the first level is easy.
Graphics: 1 (honestly, you have a barebones 3d flash engine)
Performance: 1 (flash hates 3D, if you can find a way to reduce code or increase calc speed do it)
Concept: 1 (I think your wasting this tech on a maze game, go for an adventure game or something)