Good overall...
I think this is a good, simple game. I've never played Freeway, but I have played Frogger. One thing I did not like about this game was the movement of the chicken...he didnt jump from lane to lane, which meant if a small part of the clip was in another lane with a car, he'd get squashed. It was difficult to align him correctly within any given lane.
The cars themselves had odd behaviors. They would slow down or stop and start up again for no apparent reason, and I would prefer that they move at a constant rate of speed, with varying speeds for each vehicle. And increasing speed and the number of vehicles as the levels increase. I didn't see any noticable difference between levels.
I actually found it challenging and interesting to play the 2-player mode on my own, trying to navigate 2 chickens at once was quite a challenge!