Handling input

The engine provides some simple abstractions for getting keyboard input:

--[[ This line checks whether the left arrow key is pressed
     and stores the result in 'left' ]]
left = input.keyPressed(input.key.left)

Here is a list of available key codes:

Code	Description
left	The left arrow key
right	The right arrow key
up	The up arrow key
down	The down arrow key
a	The A key
b	The B key
...	(rest of the english alphabet)
num0	The 0 number key
num1	The 1 number key
...	(rest of numbers 0-9)
esc	The Escape key
lctrl	The left control key
lshift	The left shift key
lalt	The left alt key
lsuper	The left super key
rctrl	The right control key
rshift	The right shift key
ralt	The right alt key
rsuper	The right super key