removed parameters for move commands and text field does not disappear when field input is empty
added regex for input validation. game engine needs to assume every move command equals one step in the desired direction
implemented basic dropdown for gameobjects
implemented drag and drop for if statement but cannot clone dropdown value in gameobjects
basic error checking for if command implemented
Fix bug:
engine.js make move command incorrectly.
Now move action will be assume to has the value of "1".
Added IF statement handle for engine.js