I love the original Rogue game and this scratches the exact same itch in my brain! Fantastic job.
One thing though, when using the letter directional keys to throw/zap something, the same key will be used to select the thing you're throwing/zapping. For example if I wanted to throw an arrow at something to the south west of me but my bow was in the b) slot of my inventory I'd end up throwing my bow. There doesn't seem to be any way to pick up thrown items like there is in the original Rogue either which is a shame.
Other than that I have no complaints! I can see myself spending many hours playing this.