Red Pen Panic

You have no weapon. Your pen is the weapon. Every sharp turn drops a corner, corners link into an ink line, and anything the line touches gets crossed out in red. Go straight and nothing happens. Survive three exam papers (Math, History, the Final Exam), each with five waves, two mini bosses and a boss that only a zigzag can beat. Level up, stack upgrades, and take one three times to master it. Mouse only. Made for LittleJS Jam 3.