I've got to say, this game is fairly choppy on my system. Some suggestions you could try:
A) Turn off Fine Collision detection/turn on Collision with Box on anything that doesn't check for collisions.
Set Deactivate if Far from Window to Yes on anything that doesn't have to keep doing stuff outside of the window. (This includes rings and such, but maybe not starposts.)
C) See if you can turn off Check for Background Collisions Even Outside of Frame (in the frame properties, if you don't know) without negatively impacting certain objects.
I do all of these if I can, and it really does help performance.