You landed on a hostile planet on your mission to save earth.
Quoted from a jayisgames review:
"e7 is lovingly understated and beautiful, from the rush of wind and light piano track that convey a simultaneous sense of isolation and hope, to the silhouetted foreground scenery overlaying a distant and imaginative landscape. The gameplay is simple, to be sure, but the central mechanic is fun to learn, tricky to master, and wholly satisfying once you've reigned it in. "
- Left and Right arrow to move (or "A" and "D" keys)
- Hold and Release Down arrow to jump (or "S" key)