The #1 thing to note with any achievement in this game is that if you set your lives above the default, the achievement will not pop. So if you are starting with any more than the default 3 lives, you won't get the achievement until you do.
Now, the second level is pretty easy, but one thing to note. There are fast cars on the 2nd from the top level. Time yourself and watch a few things:
- Hide between the trucks at the top level, and try to stay to the right as much as possible, especially when time is running out.
- Keep an eye on the lilypads in the river. Don't jump on the ones that turn green.
Level 2 isn't hard to jump across the river since there are logs and lily pads all over. If you're lucky, you'll almost have a straight line to park the frog at the top. Took me a few tries to get the timing down, and you will to. Remember, settings at default 3 lives or the achievement won't pop. I did it twice without popping, and once setting this setting back, it popped.