just wondering about sxore attack....
 

i dont know if anyone knows this but i got over 150000 on level 2 but died on the boss....BUT it says on the level select screen 150520 meaning i did get over the 1st ranked BUT i died. Does this count towards the acheivment for getting all 1st in score attack????also i unlocked the dynamic view with losing???

You have to complete the level without dying.

perhaps a bit too late, but i just got ultimate cracker with some deaths in between and my score high enough.
so no, you don't have to complete the entire level without dying.