On top of what everyone says here, I love that I can click on an enemy and still just directly enter the solution without clicking back.
Viewing post in Math CastLè jam comments
We argued about this too and decided together that way. We could do it even without clicking enemies but it would change UI dramatically. We want children learn math and use computers(in this case mouse) effectively in the “Tech World”. And also try to catch the enemies by clicking makes the game more challenging..