Fantastic job. My large JAVA applet for a visual interactive discovery of derivatives and integrals of vector fields had been used all around the world for almost 20 years — then the browsers effectively killed it by withdrawing support for JAVA. I had not been able to rewrite it as a freestanding JAVA main program. So happy when I discovered CheerpJ in the spring. So many happy students, instructors, and folks from everywhere who just to play and discover!
Matthias Kawski
Japanese 
English