Hey, just wanted to say that I enjoyed this! It's short and small, and I wish there was more. But you did some cool stuff with the shadow detection, and I think that's neat! The glyph on the message-boxes leaves me at a loss.... Anyways. I found two glitches if you want to address them: One is that it auto-loads the next level on space, and two is that I was able to get the door open here and I'm not sure how since they're both still clearly in light.
Good job overall!