Use the A, and D keys to go left and right. When you see an object, you can press E to try to interact with it. Flip the lever to get to the next level. When you see a light-bulb above your head, that means that you have found a new idea. Ideas give you new abilities to help you get through the level. To see all of your current ideas, press I.
Here is the download link: https://drive.google.com/file/d/0ByiSmSWvpYZhblNzR0dpaDY2NlE/edit?usp=sharing