Use the left and right arrow keys to move. Use the space bar to jump. While jumping, press the space bar again to do a homing attack. Note: You will have to search for Landscape itself.
I created this copy of Landscape to use as something to make the homing attack work, something that I could break if need be. Yaay. Please remix, part of the reason I created this was to see if I could and part was so that people (including me) could have a base for a platforming game or something. Don't ask me how to make the ground change.