Start by opening the right window and and turning the hanging arrow around.
Next open the hatch and bring out the first stick guy by clicking the arrow pointing up. Fire rock number one at the 'bridge', it wiil fall into place. Fire the next rock at the bell. this will open the door on the left. Next fire the 2 grenades at the bridge, you have to click on the bridge as the grenade reaches it to bat it into the air where it will explode. Next, fire the blue card/key at the bridge, it will fall into the hole where stick guy 2 can use it. After guy 2 opens the door click guy one back at the 'cannon', he will be loaded into the cannon. Bring out stick guy 3 by pushing the UP arrow once more. Click guy 3 at the cannon to fire guy 1 up at the bell, as he reaches the spear, click the spear to bend it slightly so the guy can land under the bell. Once guy 1 is on the 'tower' click him to move the tower to the right. Click a few times to make it fall on the spear, launching the rock onto the landmine. Next, click the door on the left and guy 4 makes his way to the door past where the landmine just blew up. This is the tricky part: start gut 2 to start walking. when the dog with the saw its the ground, click on the window above #2 this will cause #4 to open and slam shut the window, causing rocks to fall and crush the doggy.