Depending on the size of your project, it may be too large for HTML5. However, the documentation that I provided should’ve had enough information to help size down your project. Because when you’re packaging for HTML5, you’d want to focus on following the guidelines for mobile development because HTML5 is more similar to mobile than Windows (for instance).
If you’ve already went through all of the documentation, blacklisted and changed your textures, etc as much as you’re possibly able to - - you’re going to need to provide a bit more information for me to further assist you.
Thanks!