Really polished game with a great mechanic. I loved the pastel visuals and the 3D models. Everything came together in a neat package. The gameplay itself was unique, though I didn't feel the 'spell' coming through as opposed to the 'cast' part of the theme. The UI, camera animations, and scene transitions were top notch.
I do have some gripes about the UX of the game though. It felt very unintuitive to press F to exist out (instead of ESC or something similar), and having a red/green highlight to show what was being added or not would have communicated this better. I had some difficulties drawing a square at times, and I didn't see the need for the avocado, but it was fun to just make things.