+2 for moving the rock, +5 for retrieving the dagger, +3 for killing Dragon, -5 for throwing the dagger away.
To retrieve the rock, move into position above the round rock. Use an action on the rock to push it forward, which will reveal a hole under to the rock. Use an action to search the hole and you will find the dagger.
If you stand in front of the rock when you move it, you will be rolled over and crushed to death. Also, if you click the dagger in a random spot on the screen, you will throw the dagger, losing it and some points.