My frame rate was about 55 FPS (max 56 or any greater
value I didn't notice, and 45 for min value)..
I don't know if it is because I'm executing many
programs at the same time, but when the screen was
flooded of astroids the frame rate reduced to 35 and kept
between 30 and 40..
Anyway, the game is really good..
[EDIT]
Suggestion:
A little fix: you could reset variables in the main menu,
because when you die and start a new game, your variables
are still saying that it is time to overflow the screen with
astroids and enemies...

(I LIKED IT KKKK)
The worst foe lies within the self...