Back in July, I started experimenting alongside using contemporary coding agents to build a figure of mathematical visualization applets. With the extremely hectic events of the final few months, I had to set those projects aside; but I lately established a bit of period to activity on one specified project that I had started rear then, which was to modernize a Javascript interactive textbook I had made rear in 2018, entitled “QED”, and announced earlier on this blog. The intent of that textbook was to instruct propositional and first-order logic in the form of a “crafting game”, anywhere one applied assorted rules of logic to attain a desired decision from a stated set of hypotheses.
With a coding agent, I rebuilt the game (which I have stated the operating heading of “Lean Grimoire”) alongside a figure of new features, for case giving the choice to display an in-progress Lean evidence of one’s equivalent state. Just for fun, I additionally added an choice to perform in a “fantasy mode” in which assorted equivalent elements are depicted using fantasy-themed sensation content (for instance, mathematical statements rotate into “potions”, mathematical expressions rotate into “scrolls”, and so forth). Here is a representative screenshot, in which one has nearly completed the evidence of the assertion 
I would be curious in having several playtesting of this app to create it additional helpful as a method to instruct logical proofs and/or Lean.
