Beat it with 232 deaths. It's crazy hard though. And I think I might've died more on level 14 than the last level. I thought it was impossible before I figured out that you could keep the first missile from chasing you.
There's a sloppy coding glitch, though. It keeps displaying the medal unlocked notification in the corner for the 100 deaths medal every time you die. I hated it because it shows up in the place where you usually have to go right at the start of the level and so it hides the level for you and makes you have to work blind for a moment.