Once you've performed an action, you may proceed to the big cannon. Once again, press the action key. As a result, you will be able to blow up the door (#1). Enter the new room and use the small ladder. Once you're at the top, destroy all of the surrounding crates (#2). You should be able to collect at least 300 gold coins here.
Once you've cleared out this room, head on to the lower side of the screen. Stand on the glowing spot and press the action key (#1). As a result, Jack will use the rope to reach the lower level. Don't use the nearby gate just yet. Instead, turn left and destroy a few other barrels (#2). One of these objects will contain a second pendant. Pick it up.
Make sure that you've destroyed all crates and barrels, because you won't be allowed to return to this location. Use the switch that's located near the gate (#1). Wait for the gate to open itself. Head on to a large bridge. A short cut-scene should appear on your screen (#2). As you've probably noticed, a larger group of enemy units was waiting for you here.
We'll start off with three "standard" enemy thugs. The easiest way to take care of this problem would be to use your standard attacks (#1). Alternatively, you could perform a few Ole moves. Once the enemies are gone, you will have to defeat the second miniboss (#2). Once again, it's very important to block his attacks. Additionally, perform successful counter-attacks. Don't forget to collect gold pouches from the bodies of fallen enemies.
Keep moving forward. You should encounter a few crates along the way. Destroy these objects and collect some gold (#1). Don't forget about one of your subquests. You're going to have to collect at least 850 gold coins in order to fulfill it. Once you've reached a glowing spot, stand on it and press the action key in order to be transported to a new location (#2).
Don't go up just yet. Instead, turn left and use the nearby stairs (#1). You should be able to enter a new room very soon. This is a second stash of this mission. Make sure that you've destroyed all barrels, because one of these objects will contain a third pendant (#2). I guess I don't have to tell you to pick it up. You may go back to the lower area.
Head on to the previously unexplored corridor. This is where a very interesting mini-game will take place. It's called Jackanism. The rules of the game are very simple. Your job is to press certain keys, according to the icons which will be displayed on your screen. If you make a mistake, YOU WON'T BE ABLE to repeat the mini-game. The only solution to that problem would be to start over the entire mission. As a result, you must stay focused in order to succeed. The game will display some of the possible key functions on your screen. You will be pressing these buttons during the course of the mini-game, so make sure you've read all hints. Here's the list of possible keys:
1) hold key (represented by two characters - a yellow and a blue one) - C
2) WEAK attack (#1) - it's very important that you don't make a mistake here; the icon represents the Z key, not the X key (the X key has a lot of orange under the sword)!
3) upper movement cursor
4) all movement cursors; they have to pushed clockwise (and fast :-))
Once you've read all hints, the mini-game will begin (#2). Thankfully, even if you actually make a mistake, you will be able to continue your journey without any other interruptions. The only disadvantage is that you won't be allowed to collect a Charm Card. Check the second chapter of my guide if you want to find out more about some of the available bonus items.