Hi, this is a simple mouse trap which works on its own. If the mouse walks in, the door is released and falls down. 

To enhance the durability of the closed door, two magnets of the size 5x5 millimetres could be applied to fix the door in the closed position.

If you print the door, you have to turn it 45 degree on x-achsis as I designed it on a tilted base

You can use as many extensions as you like, if you think this trap must be longer.

You don't need glue. All parts fit together as they are printed.