Well, i have a lot to say, I like the originality in your game idea, but whatt's sad is that there is no sound. It might be great to give more patterns to draw, this part was super cool, also draawing in black would be better ! It was an ok experience only, but just because sound missing, as for interaction with the environment, like a door sound opening and all. Upgrade this only, the sound parts, and your game will be way better !
Keep up the hard work, you got something here !
I would love to hear constructive feedback from you too ! If you have the time of course !