Game design is easy when you get to know it. The software which i will be teaching you how to use is called Game Maker. You will need to download this here.
Ok, i bet by now you have messed around with it etc. now here is where i will be teaching you how to make a simple game. but i will be showing you how to make:
To Add Sprites:

To Add Actions:

Can you do some more with gamemaker?
id like to know!