Click on different objects and get things, press space to open and close inventory or click the inventory button. Use the right and left arrow keys to look around the room and use the down arrow key to go out of things. To use something open up your inventory and click on the thing you would like to use, then drag it over to what you would like to use it on and see if it works. If you would like to put the tool away just go into your inventory and click the tool again. Use T key to turn things that you need to turn.
