Scratch Cat is lost in space and needs to pass through 5 magic doors to get home! ARROW KEYS. Cat jumps automatically when leaving platform going forwards. Can't leave platform going backwards. IT'S ALL ABOUT THE RUN-UP - the longer the run-up, the further Cat will jump. You can't control Cat while in air. Good luck!
Thanks to @DadofMrLog for the triangle-filler. Scratch team for the Cat costume used at end. Falling time now reduced as per suggestions. May need to click green flag more than once.