Program a sprite to move with arrows.
Y gets bigger as it goes up.
Y gets smaller as it goes down.
X gets bigger as it goes to the right.
X gets smaller as it goes to the left.
Less Comfortable: Program a sprite to move up, down, right and left with arrows. Here is an example.
Comfortable: Program one sprite to move up, down, right and left with arrow keys. Program another sprite to move with WASD. Here is an example.
Most Comfortable: Use a forever if loop to program your sprite to move with arrow keys. Program another sprite to move with WASD. Here is an example.