For each file provided:
Write a concise summary that would be a good comment at the beginning of the file, explaining what it does.
The summary should be formatted as a C++ doxygen file comment.
Break lines at 72 characters. Example:
/** 
 * @file micropolis.h
 * @brief Header file for Micropolis game engine.
 *
 * Bla bla bla...
 */
After the comment code section, write as normal text a concise review of the code, mentioning any possible problems, especially relating to emscripten.