Sappy Mugs is a motley dingbat font containing sundry cartoon images.
This font includes a license that allows free commercial use: sometimes referred to as a desktop license. This allows you to install the font on a computer and use it to create posters, web graphics, game graphics, t-shirts, videos, signs, logos and more. Read the license agreement for details.
There are no restrictions on what you can do with the images contained in this font. Trademark them. Make posters. Start your own cartoon empire. Whatever.