Nice job tho. Now just need to make it in 3D.
Comparatively HTML5 is very lenient in its spec. Browsers are even more lenient in their implementation.
Do you have any examples of undefined or linient rules?
I'm a big fan of optional closing tags that HTML5 has. Can do stuff like:
<h2> Todo List <ul> <li> Do task A <li> Do task B <p> Dear Diary, ...
Nice job tho. Now just need to make it in 3D.