Enemies are currently letter x's whilst bullets are letter o's.
The game is nice and fast, and as RSKGames suggested in a comment, it does indeed have a "World of Castles" vibe going on.

The regular AGameAWeek deadline is pretty much imminent, so I think I'm going to let it whoosh past, and instead give the game the attention is deserves.
Chests and Treasures and Hearts and Potions and a whole bunch of evil do-ers roaming around the dungeon.
That's probably the best way to go.

.. oh, and some decent graphics, too!