Somehow the name just feels like an innuendo and I can't stop myself from giggling every time it talks about a big black book. XD
There was no sound at all when I started the game, but after the intro played I didn't wait long enough and clicked "Skip intro" before it turned into "Start". Thinking I had missed something I refreshed the page and for some reason the second time I had sound. I'm glad I didn't miss out on that whole aspect!
I feel like I recognized the character sprite from the winner of the last jam, was that also you?
This game felt really polished and solid. The menus and little effects everywhere... so good! Once I started the game I was very confused about what was happening or what I was supposed to do. The intro explains the controls but I didn't realize it was a tower defense sort of thing. Initially I just thought "wow I'm glad those skeletons can reach me" and "what is that progress bar that's counting down?"
After that I kept thinking the side walls were pass through because they were dark so I tried to shoot the skeletons through them. Once I finally figured out the teleporters things got a bit easier, though it was still hard to shoot over the castle walls.
I was amazed by how well the magic missile spell worked at first. Then I got an upgrade and tried the lightning spell and couldn't get it to activate a single time. I died because of that and on the secodn try I double checked the sample drawing for lightning -- as a side not it would have been nice to have those on screen always -- and once I verified I had the right shape I tried a bunch more times and only got it to work once. I drew a few random lines out of frustration and got it to activate a second time somehow, but then the castle crumbled and that was the end of my dabbling in magic! :D