they had to Gronda Gronda to the Rango of Arg, which was the plant IIRC. That was the 2nd incarnation of the Adventure game, the original was a few years earlier and bit more adult with more complex puzzles
I was pretty young when that was on the box. Just remember it being bizarre with that plant that used to shake around and get angry. Wasn't there some mouse in a maze thing they had to do too ? Remember that bloke speaking backwards too 'doog yrev ! doog yrev !'