In the game folders under the cave level folder their is a file called main.xml
You can modify this file to...

• Chose spawn point (in cave)
  
• move other objects or people
  
• realy mess up the game

Now as far as getting to a secret room the only thing to do is to modify the "start" cords. 5 lines down on the file.
top left is 0,0 If you mess up here is the original cords x="16.5" y="29.5"

In this picture I only moved the sprites. I did not move the action for interacting, so if you want to you can move all of the sprites and actions to this small opening and finish the game in a few secends, if done right.

If this guide gets attention I can give the code for what i mentioned above. Move all actions to this opening near the start of the cave.

Feel free to ask any questions!