Let's make use of the arrow keys, of the keyboard, to make It move.
If possible, you can allow the use ofa joystick, too (you need to know if the current version of the LDK allows the use of a generic controller type).
The input and movement of the character must be the most similar to the original Arcade version as possible.
On Pac-Man, the AI of the ghosts have basically two possible states: Scatter and Chase.
Each ghost has a unique personality that defines, during their chase state, which is their goal positions and how they should approach that position. Some of them use the position of another, so you should implement an unique AI logic for each ghost and provide access to another entities' data.