Thanks for the feedback!
Not having a reset was intentional. Theseus doesn't spend time in hell in the myths, but I thought of this game as his own version of hell: the maze is endless and there's no Minotaur at the end. Ariadne's thread is there, but it doesn't lead you back anywhere. Once the light goes out, you can technically keep going with just the sound effects as a guide and your score can keep going up, but it's a meaningless process.
Good point about WASD, but I'm not sure if I can remap the controls in Pico-8 x__x