Adding options for graphical output

[MaineC]

First of all thanks for putting the code for this generator on GitHub, under an Open Source license and even setting up a running version of the project. This just saved my day!

In addition to what is available here, I would like to be able to create the tasks in a slightly more graphical way. Here in Germany it looks like math puzzles like the following aren't uncommon:

https://www.google.com/search?q=zahlenmauern&client=ubuntu&hs=uks&channel=fs&sxsrf=ALeKk02kD2ZJK9j9e-59jOtNtu0NF82lrA:1605256611835&source=lnms&tbm=isch&sa=X&ved=2ahUKEwjwi_zwjv_sAhXDy6QKHQi_CI0Q_AUoAXoECB4QAw&biw=1848&bih=979

(There are also a few more ways of drawing math puzzles).

Do you think it would be feasible for you to teach a Java backend engineer who's so far spent a lot of time on search about your project, the tech used here and frontend development in general that I'd be able to add this functionality in a "patches welcome" kind of way?