HFF Fourth Rock is based on Mars Bounce from page 83 of "Brushstroke and 
Free-Style Alphabets: 100 Complete Fonts" by Dan X. Solo. Mars Bounce is also 
featured on page 92 of "The Solotype Catalog of 4,147 Display Typefaces".

HFF Fourth Rock is a free font. You are free to use this font in any way you 
want to. You can share this font with others if you wished to. 

Use freely, share freely and, most of all, enjoy the font.

Have fun
HFF