Regarding the Text object. There is a plugin where you can do some fancy stuff. I saw it once but can't really remember the name. Anyway there are several plugins to do a fancy things with text.
You might want to check the list and search for "text":
I guess those were the plugins I saw a while ago. They seemed fine, but I still think that for a basic object type like the Text object, Scirra should include a bit more customizability. And also, it was requested before. I'm not asking for complicated features, they just need to add the support for using the <span></span> tags basically. If it's already possible, then it's my mistake, but please tell me how can I do it.