*bump* Id like help! I cant test my programs untill this is fixed!

I am using lua for 3.1 with a 3.1 student software

Oh wow, do NOT ever do image stuff in a loop, that's what causing your issue ;-)

Here's how you want to do it :
(after the 2 lines of images strings)

dx=50
dy=50

function on.paint(gc)
gc:drawImage(background,0,0)
gc:drawImage(duck,dx,dy)
end

function on.arrowKey(arrow)
if arrow == "right" then
dx = dx + 5
elseif arrow == "left" then
dx = dx - 5
elseif arrow == "up" then
dy = dy - 5
elseif arrow == "down" then
dy = dy + 5
end
platform.window:invalidate()
end

I suggest that you read Inspired-Lua's tutorials and Steve Arnold's
They really well explain the basic concept of events, the base thing you need to understand first

Also, to have a full reference of the Nspire-Lua API, don't forget Inspired-Lua's wiki (based on (and improving) the official doc)

BTW, Levak and I have created a presentation some weeks ago : "Improving your Nspire-Lua skills" you would be interested in : http://tiplanet.org/forum/archives_voir.php?id=6720 (clic on "Télécharger") - you might prefer the powerpoint version)

Then, instead of using the function on.arrowKey(arrow), create one where you calculate the move, e.g:

function AI()
    --place your Artificial Intelligence code here

    --if direction==1 then
    --dx=dx-1
    --dy=dy-1
    --else
    --dx=dx+1
    --dy=dy+1
    --end
    --if dx==0 then
    --direction=1
    --end
    --if dy==240 then
    --direction=0
    --end
end

BTW, I see that you use an image from the NES & since the resolution is smaller, it will look awkward, so I would suggest to draw the rest of the background, this code would do:

function on.resize(width, height)
    ww = width
    wh = height
end

function on.paint(gc)
    -- Paint background (sky)
    gc:setColorRGB(96, 176, 248)
    gc:fillRect(0, 0, ww, wh)
   
    -- Paint floor (dirt)
    gc:setColorRGB(104, 104, 0)
    gc:fillRect(0, 175, ww, wh-175)
   
    gc:drawImage(background,0,0)
    gc:drawImage(duck,dx,dy)
    AI()
end
Maybe you'll want to place drawing the duck image inside the AI() function, because if you're going to move the image a lot, it will look like it warps. So, you'll need to add the parameter "gc"

function on.paint(gc)
    ...
    AI(gc)
end

function AI(gc)
    gc:drawImage(duck,dx,dy)
end


Yeah try not to use > 15k