How do you get the dynamite as an upgrade to add to your achievements list..

You get the fire crackers from bean when you have finished all of the desert there is a hide out and a little maze in a fenced in mine ask the bird to take you to the east desert and when you get off of him the cave is in front of you above a rock were a fire cracker guy attacks you. Beside it go up the hill and in the mining old wooden broken like door and then go in and down the hall past two side by side bad guys passing one street and go through straight killing one big guy and then before you turn left down the next kill 2 side by side guys turn left kill one bigger guy and then a short right and enter the maze like yard and when your up top and think your finish keep looking and keep going and jump down into a whole new yard don't turn back till the story tell you after finding bill to go back to dirt it self ok .Yes my mistake was thinking I was finished it and turned back but it went further and then I was able to finish it and get bill and move on back to dirt for bean to give me all of the fire crackers which also blows up walls trees bad guys, gates etc..........hope this helps.