I lost mouse focus a couple of times by moving the pointer out of the browser window in the HTML5 version which lead to multiple game deaths. This didn't happen with the flash version. Is there some technical barrier in browsers preventing complete mouse capturing?
Not a good practice. If you keep changes of .less files separate you create an overhead of 50-100% of the resulting style-sheet file size for larger projects, that style most of the components.
We now directly modify everything and try to merge in updates manually. This has proven to be the best practice.
I watched the beginning of the NASA JPL press conference and the overt patriotism was unbearable (at least for me as an European citizen). They not only coarsely described as an American victory, but also patronized foreign Mars projects – the successful ones apparently being a result of "American leadership".