It is hard to be sure but I don't even think that's it. Even from the first level, the barrels appear to have no real pattern. Yes there is a pattern in the subsequent barrels, but as to which set you'll get...totally random afaict. To me at least that's unfair.
It's kind of like the official Pacman sequels, which use the standard ghost logic compared to Junior Pacman, which uses a crappy, totally random function. I like a challenge, but I'm not too keen on the game "cheating" it's way to victory.