In the game Noob VS Evil Granny, Noob's girlfriend has been taken by a creepy and scary granny. You have to help Noob go into her house and save his girlfriend.
Learn how to use your controls first. Move with WASD, look around with the mouse's buttons, and use F to pick up items, R to reload, Shift to run, Space to jump, and CTRL to crouch.
Through the six levels of this game, each one gets harder than the last, you have to explore Granny's house without getting caught by her or any of the other monsters there. This is so you can find Noob's girlfriend and save her since she was taken by one of the monsters.
Have fun and good luck!