I like the minimalist graphics, too. However, I feel some levels were not well designed. Like in the school, where the L to R hallway on the top it meaningless. I have no reason to traverse up there, but did to see if there was something I was missing. But nothing. The maze, too, had some parts like this. Overall, I think you can attribute this to the speed, though.
(btw, also in this jam, with the game Literate. Check it out? Feedback is always welcome.)