Thanks for the input! Some of these are addressed in the tutorial, but we’ll put them on the game page as well and make the tutorial more thorough post-jam.
UFOs make you invulnerable (might not work in the jam version), give you points for each full crank you complete while they are active and give you more speed for each crank.
Hurdles slow you down and deduct points. You can jump over them by pressing left arrow or B.