Great game! The movement system is really nice and with some extra sound effects and UI work, it would feel really polished and ready for a full game. Admittedly I found the controls quite hard as a lefty, but that doesn't mean anything is wrong with the game, just that it would be nice to have a controls screen as an extra feature (as all 3D games should!). The combat felt pretty clean, but maybe the enemies should miss sometimes :P
All that said, this is a pretty good game and with some extra work and polish it would be very marketable!