Well, my high scores are nowhere near any of yours (302 in Score Attack (which I did only using eggs to attack enemies, not thinking of doing bubbles on the ground 

), 4,306 in Marathon, 3:54:2 in Time Attack, and a measely 1731 in Challenge), but I just got the game yesterday evening, so give me time 

This game is wicked fun, I must say.  I'm usually not big on High Score games, but it's such a fast-paced, ingenius, fun game I can't help but like it.  It's amazing how quickly you adapt to it (at first, I couldn't hit anything on the top screen with my eggs but now I'm ace).  I love it.  I'm playing it so much my computer monitor seems to scroll, it's insane.
I'm using the bullet shy guy as my score picture.  I think the picture instead of initials is a really cool idea. 
Edit: Okay, change that 302 to 366 
 Edit: Okay, change that 366 to 394