Smore Land - Stage 4 - Commando
Put a ginseng factory behind Eets at the start and give him a nudge over the end to the goal.
Smore Land - Stage 11 - Ninja
Tricky one. Put a ginseng factory behind Eets (a method appearing here?). When he gets near the end hit him with as much as you can. The goal is to get him to just drop off the end and just turn mad. If you do it right he'll be facing the right way and will munch through the marshmallows just enough so he drops onto the goal. Quite often he'll miss the goal but you can get it.
Smore Land - Stage 12 - Ninja
First off stick a whale ahead of where eats will just so you can shoot him up to the whale above. This will get you onto the right side of the screen. Now (the predictable bit) stick a ginseng factory to the right of the puzzle piece, about 2/3 of the way to the ledge, facing left. When Eets jumps over start shooting like mad, if you catch him right it'll push him into the puzzle.
Smore Land - Stage 13 - Commando
Just drop a whale behind Eets, you'll need to get him as far left and low as possible. He should be able to propel Eets down onto the middle shelf where he'll turn round, eat the Angry Bud and jump to the puzzle piece.
That's it for now, I think the others have been covered. Need to finish off Smore Land now :-)