Thanks! I write my code in Notepad++, then I merge all files into one file pp.js and minify it with SQZR.js (my owm minifier, performs the same thing as Closure Compiler, but is about 50x faster).
I don't think you can compare your minifier to the Closure Compiler. For one, it doesn't type check or transpile. But I definitely commend the DIY attitude!
You're very talented. Other than photopea, those are some pretty good libs you have in github. Im starring it now and will check it over weekend (Im into image processing and stuff).