+Dynabombs are an infinite supply of bombs that the player can drop at any time
+he doesn't have anything else to drop. They explode in a cross shaped pattern,
+and may have strange results when they kill enemies. (For example, Yam Yams
+will only give off the center element of their pattern.)
+
+This pickup increases the length of the explosion.
+At first, the explosion only reaches one square in each direction.