Thanks for the feedback! In terms of Magical Girl-ness, the focus I had was really on the main character, who I tried to give the requisite attributes. I admit I drew a bit of a blank on trying to make the other components (the dungeon and the enemies) feel like they belonged in a Magical Girl work.
In terms of it opening a tab, yeah, that was an oversight. Shift+T is also available as an alternative (originally all the Ctrl+? controls were Shift+? until I realised that I couldn't detect numpad keys and shift at the same time for some reason.)