im surprised, nobody mentioned
mine madness or
bow and arrows! those are fun, anmd quite easy games too, and not so pointless as comet dodging or surrender race
also, as some of u already said, i liked
shoppas at beginning too. roping was the most fun!
some more games which can be played in an easy way, and still gives some experience:
burning girders, tower race (better not too big ones), holy war, super sheep race, and all "normal" games, like
mole shopper, intermediate (modified scheme!), elite, team 17, etc.
beginners can look after schemes here or at worms2d.info, and play what they find nice
hf!