[quote name='io']I gave it another shot tonight and

yeah, I beat 13! It took me about 10 tries, and I'm not sure the game was changed much at all except for the faster AI (which *really* helps because you can get through the game much faster). I beat it through practice and some luck. On my winning one I had the AI make 2 mistakes (that's about it the whole game) and I got a couple of health boxes at the right time. I had 3 worms to 1 at the end, but I thought I was screwed because he was nailing me from across the field and I couldn't touch him. But I had one teleport left and enough health in that worm to take his next shot, then I nailed him.
Just so you know - the next level is MUCH easier. I beat that one on the second try, and level 15 seems easier too. I only tried it once but I made a few huge blunders and still almost won.
I picked up the gold damage achievement while I was playing too. Now I only need the 4-player online game, the Sheep kill one, and the Challenge Mode one of course.
Here's a good starting strategy though - use the jetpac and drop your dynamite on the two worms to your right (near the barrels). You can generally kill 1 of them and severly weaken the other, and that takes out the ones who can pick off your guys on that side of the field. Use the sheep on the 3 that are down low in the middle. Then just luck from there on out

. For example, I ended up getting a second sheep in a crate - very nice indeed...[/QUOTE]
it gets easy again til 19 and 20
still stuck on 20, gave up after 3 tries tho - maybe i'll try again with faster AI now