That save file doesn't actually store times, they're in the registry. Other than this specific purpose, I don't think there's any real reason to save them in a file. I'll be adding options to clear records and progress, though.
The keys to 0-8 are jumping to make the float boxes fall ASAP, throwing the fallen float boxes, and then jumping straight from the third box on top of the ones you threw. I got 8.65 with that, so 9.2 is fairly generous.
I'll change 0-11 to 6.2. I was throwing the second box before instead of pushing it.
Man, 1-2 is tough. I guess the strategy is "jump across, drop Asha in front of the monster door, break one box and absorb the other, remake box temporarily to crush bottom slime with door, drop it on top slime, run for exit." The timing on the crushing seems awkward, so I might see if adjusting the cycles makes it better.
EDIT: Changing the position of the wood door so that the recreation of the box on top can also crush the bottom slime, I got 9.35.