Any good tips for the 140's in CC1?

[Ida]

I was so depressed with Force Field. My husband and I would have it open on the computer for days, sometimes getting down to as little as 2 chips left, but never finished it. Some ofthe boostings were too difficult, I, like, closed my eyes and pressed random arrow keys hoping for the best. Then eventually I took the time to learn how to get the timing correct - exactly how long time to wait from stepping off a floor tile til I had to press the arrow key to boost Chip in the right direction. Once I got that, it wasn't that hard. (I'll never attempt to do that level with a good time though - thankfully it's untimed!)