I have no clue how you managed to make such a beautifully looking game with the limited shapes, incredible job! Gameplay is fun too, especially that it is quite challenging (atleast for me).
For the sound tho, the sound for the ray that is cast on the pyramid had the equivalent effect on me as putting chalk across a schoolboard. The 'whoosh' sound made up for it though!
Also, I only ever managed to survive with 8 pyramids collected, but I must have missed 2 and the shield-circle, after I had missed the two pyramids, went into a desert without anything there. I think this goes on endlessly so the game does not end.
Probably the best visuals out of any of the games!