It's a fun concept, liked the simplicity of the story to the gameplay. I did however have some troubles playing. After I press "restart" the game seems frozen with no input working and the demons face is stuck in the middle on the timeline.
I also had trouble drawing the symbols correctly, even though I thought I was pretty close drawing the symbol, the game didn't think It was correct enough. (I think it bugged out and didn't work at all while in embed, I did succeed once only in fullscreen, or maybe I was just too terrible at it)
Really hoped I could see the ending, great voiceacting!