Have you downloaded free version of Game Editor?
If you have, open it up and click help on the bar at the top.
I'll also give you a quick tut if the help section isnt enough.
You want to start by making a new actor. Click on Add actor at the top and type in the name of your actor. Make sure that the type of actor you have selected is normal and click "add". The pacman icon that comes up means that your actor has no animations. Right Click on the actor's icon and select "actor control" to bring up the Actor control panel
Here, you can add events, animations and you can even clone your actor. First, click on "add" next to events and click on Key Down. A panel will appear, click on the Keys part of the panel and then press any key that you want to use(i would suggest using up, down, left and right for now) when you play your game. Make sure repeat is set to enable and click "add action".
You want to then click script editor. The most basic script editor function is allowing your "player" to move. The script is as follows:
Moving up:
y=y-5;
moving down:
y=y+5;
moving left:
x=x-5;
moving right:
x=x+5;
Obviously, you can change the number to be anything you want depending on how fast you want your character to move.
and remember that -x is left, +x is right, -y is up and +y is down.
Click on add then Immediate action to finish your script.
now when you click on Game mode, you should be able to move when you press a key.
Now, obviously, you're starting to get a bit annoyed by that Pacman icon aren't you? Open actor control like before and click on add animation. click on Browse to find a picture to use as an animation. You can give your animation a name but if you dont it will use the name of the file anyway. now click add.
in you game, you can change the animation of the actor. do key down like before and this time select Change animation. Simply click on the animation you'd like to change to and make sure you select the actor you want to be changing animations.
This should now work in game mode.
Hint: you can make moving animations easily. when you save your files using Paint or any image editor, if you number them img 1, img 2, img 3, img 4, img 5 ; each number being a different frame, you can use each image seperately in Game editor in the correct order. When you add a new animation in GE, change "Single file" to "Multiple files". You can now change the frame rate (fps) to speed up or slow down your animation.
That's all! There are loads more tutorials on the forum, just look hard for them! PM me if you need anything else!