First off, I played the Webbuild and I really like the atmosphere you building up with the intro and visuals. I felt a little like in a monster/horror movie, which is great!
Then I joined the first boss fight and man was I confused. I saw the pattern I had to place while evading the red little dudes, but I was thinking that I have to catch the little red dudes with my drawn symbol.. it took me two rounds to finally understand, that I have to draw the symbol and move the tip of the Tower on to the first symbol and hit the drawing key to actually hurt the boss. It was kind of a struggle to understand that, maybe I over read something in your tutorial, if so I feel stupid.. but if not it would be less frustrating if you put a little instruction or small tutorial/animation into it :)
But after understanding the mechanics it felt great and also kinda frantic as one has to move / evade a lot. It is a really atmospheric “puzzle” game and I can see it being explored more in depth. When steam ;)?
PS: Having a menu is also great and gives the game a more complete feeling.
Job well done!