the space+arrow combination only works by using just one arrow at a time, thus, first, you set the direction you are to throw using left or right arrow and then later you just press the up key and spacebar, your character will automatically throw it to the direction you set earlier. ;]
 "Stellar hunter 2"){kind=icon}
 "Blue Box"){kind=icon}
 "Headless Zombie 2"){kind=icon}
 "Little Wheel"){kind=icon}