simple door lock project

I have a project a simple door with password. Anyone can give me an idea what feature to add in my project. I am looking for easy programming and cheap materials. Thanks in advance.

Anyone can give me an idea what feature to add in my project.

An axe murderer that jumps out and dispatches anyone that doesn't know the password.

I am looking for easy programming and cheap materials.

All programming is easy, when you know what you are doing. I wouldn't trust cheap materials to lock my door.