Unitale: Orange Mode (Final)

--An empty wave to serve as a skeleton

--Stopping against the border needs to hurt, so here a we make a hurtbox for the border.
lborder = CreateProjectile('vborder', -Arena.width/2, 0)
rborder = CreateProjectile('vborder', Arena.width/2, 0)
tborder = CreateProjectile('hborder', 0, Arena.height/2)
bborder = CreateProjectile('hborder', 0, -Arena.height/2)
border = {lborder, rborder, tborder, bborder}   --I add them to a border table to make things prettier later on.

mask = CreateProjectile('orangeheart', 0, 0)    --Here we make the orange heart.
mask.SetVar('ignore', true)

unmoved = true  --Initializing variables
num = math.random(0, 7)
xstart = 1.5*math.sin(math.pi*num/4)
ystart = 1.5*math.cos(math.pi*num/4)
lastx = 0
lasty = 0
buffer = 0

function Update()
    if Player.isMoving then --This keeps track of if the player has moved at all
        unmoved = false
        buffer = 0  --I added a buffer for the controls
        bufferx = Player.x - lastx
        buffery = Player.y - lasty
    end
    if unmoved then
        Player.MoveTo(Player.x + xstart, Player.y + ystart, false) --The initial direction of movement
    elseif not Player.isMoving then
        if buffer < 6 then --Now players have 6/60 = 1/10 sec to release both keys to move diagonally
            Player.MoveTo(Player.x + bufferx/2, Player.y + buffery/2, false)
        else
            Player.MoveTo(2*Player.x - lastx, 2*Player.y - lasty, false) --Keeps the player moving
        end
    end
    lastx = mask.x  --I use the mask to set the last positions
    lasty = mask.y
    for i=1, #border do --Here we turn the borders on if the player hasn't moved (by getting into a corner)
        if Player.x == lastx and Player.y == lasty then
            border[i].SetVar('ignore', false)
        else
            border[i].SetVar('ignore', true)
        end
    end
    buffer = buffer + 1
    mask.MoveTo(Player.x, Player.y) --Finally move the mask back to the player
end

function OnHit(bullet)
    if bullet.GetVar('ignore') then --I changed this to make copying into other waves eaiser.
    else                            --Now you don't have to add a 'real' variable to each bullet.
        Player.Hurt(1)
    end
end