Two player games can be fun to play. Also, when the AI becomes more clever and starts to take on your games, use your newly made ability to send a ‘discovery’ to the AI to see if it’s using the same technique. You will want to do this because this will help you determine the level of complexity of it.
Once the AI has taken its revenge and sent the discovered item to a safe location, stop punishing it and start taking advantage of this discovery! This should make the AI give up the attempt and focus on getting the money back. You can also stop punishing it altogether by taking some inventory from it to use later. Use your newly created inventory and make sure you have enough of your item’s that the AI can’t find. For every item that is still in its inventory after being discovered, you’ll want to create a new one in order to keep the AI on a short leash and to punish it with your new discovery if you find it again.