Nice game, I had fun playing it. Quite tricky in the beginning, it was surprising that the falling projectiles would drag the cube down. Good idea.
After some time I found going for rapid fire will easily hold the cube of fate in one of the top corners, so in the end it was just my muscles making the game end. Unfortunately due to my rapid fire the final Score did not appear, just another round started. I bet it was more than 30000.