Scroll down to the bottom and press the "CRIAR!!!" button and you should be off.
It's in Portugese but I'm sure you'll figger it out (I'm still finding my way). If you do why not leave us all some handy hints'n'tips? And Yes! You can do Marvel heroes too. It's up to you.
I'm having big fun time creating OKComicsman and Pickles The Boy Wonder. I've done one ear now. But it's a good ear.