A broken encounter please help.

-- The encounter wasn't my idea. I just made it a reality.
music = "ooo" -- Music set in audio folder. If having trouble convert to .ogg.
encountertext = "The Grey Child stands in your\rway." -- Text that appears in battle box when the ecounter starts
nextwaves = {"bullettest_chaserorb"} -- The next wave set at start.
wavetimer = 0.0001
arenasize = {155, 130}

currentitem = 1

-- Enemies on screen, can have multiple enemies. Found in monsters folder.
enemies = {
"core!frisk",
"items"
}

enemypositions = { -- Position of enemeies. Works in order of listing.
{0, 0},
{0, 0}
}

mask = nil

-- A custom list with attacks to choose from. Actual selection happens in EnemyDialogueEnding(). Put here in case you want to use it.
possible_attacks = nil

-- What happens when you start the encounter lua script
function EncounterStarting()
    -- If you want to change the game state immediately, this is the place.
    -- Don't ask why the player's name is in the monster's lua file it just works here.
    Player.name="Chara" -- Name of player.
    Player.lv=1 -- The player's level.
    Player.hp=20 -- The player's starting HP
    SetGlobal('turn',0) -- Sets the turn to 0 because we haven't had a turn yet.
    SetGlobal('fight',0) -- Sets the global value of fighting to 0. [See core!frisk.lua]
    SetGlobal('sparing',0) -- Sets the global value of sparing to 0 or false.
    SetGlobal('pacifist',1) -- Sets the global value of sparing to 1 or true.
    SetGlobal('question',0) -- Sets the global value of questioning to 0. [See core!frisk.lua]
    SetGlobal('flirt',0) -- Sets the global value of flirting to 0. [See core!frisk.lua]
    SetGlobal('insult',0) -- Sets the global value of insulting to 0. [See core!frisk.lua]
    SetGlobal('masked',false) -- Something to do with the item system hack :P. Hides the heart or something in the item menu.
    enemies[2].SetActive(false)
end

function EnemyDialogueStarting()
    -- Good location for setting monster dialogue depending on how the battle is going.
    -- Example: enemies[1].SetVar('currentdialogue', {"Check it\nout!"})   See documentation for details.
end

function EnemyDialogueEnding()
    -- Good location to fill the 'nextwaves' table with the attacks you want to have simultaneously.
    -- This example line below takes a random attack from 'possible_attacks'.
    nextwaves = { possible_attacks[math.random(#possible_attacks)] }
end

function DefenseEnding() --This built-in function fires after the defense round ends.
    enemies[1].SetActive(true)
    enemies[2].SetActive(false)

    if GetGlobal('pacifist',1) then
    turn_dialogue = {
        "You stare at Frisk.\nFrisk stares back at you.",
    }

    encountertext = turn_dialogue[GetGlobal('turn')+1]

    SetGlobal('turn',GetGlobal('turn')+1)
    end
end

function HandleSpare()
    if enemies[1].GetVar('canspare')==true then
        State("DONE")
    else
        State("ENEMYDIALOGUE") --By default, pressing spare only spares the enemies but stays in the menu. Changing state happens here.
    end
end

function HandleItem(ItemID)
    BattleDialog({"Selected item " .. ItemID .. "."})
end

-- THE ITEM SYSTEM ISN'T MINE CREDIT TO: carnegiesgrave. Thread: https://www.reddit.com/r/Unitale/comments/40bbgl/020a_item_menu/
function Update()
    if GetGlobal('masked') and mask==nil then
        --We need a mask because using State('ACTMENU') hides the Player heart by default - just a bugfix, basically
        mask = CreateProjectile('ut-heart-red',0,0)
        mask.MoveToAbs(64,190,true)
    elseif GetGlobal('masked')==false and mask!=nil then
        mask.Remove()
        mask=nil
    end

    if Player.absx>=350 and Player.absx<380 and Player.absy<=32 then
        if Input.Confirm==1 then
            --Now we swap the pretend enemy with the real enemy.
            enemies[1].SetActive(false)
            enemies[2].SetActive(true)
            --If we don't change state indirectly, such as from BattleDialogue, it skips straight to the first act command
            BattleDialog({"[func:State,ACTMENU]"})
            SetGlobal('lies',true)
            SetGlobal('masked',true)
            currentitem=1
        end
    end

    --Input handling for the pretend Item menu.
    if GetGlobal('lies') then
        local inventory = enemies[2].GetVar('commands')

        --This is for handling one page of variable commands only. Nothing more will work right now
        if Input.Cancel==1 then
            SetGlobal('masked',false)
            State("ACTIONSELECT")
            SetGlobal('lies',false)
            enemies[1].SetActive(true)
            enemies[2].SetActive(false)
        elseif Input.Right==1 then
            if mask.absx==64 and #inventory>currentitem then
                currentitem = currentitem + 1
                mask.MoveTo(mask.x+264,mask.y)
            elseif mask.absx>64 then
                currentitem = currentitem - 1
                mask.MoveTo(mask.x-264,mask.y)
            end
        elseif Input.Left==1 then
            if mask.absx>64 then
                currentitem = currentitem - 1
                mask.MoveTo(mask.x-264,mask.y)
            elseif mask.absx==64 and #inventory>currentitem then
                currentitem = currentitem + 1
                mask.MoveTo(mask.x+264,mask.y)
            end
        --never program nested ifs at 1 AM
        elseif (Input.Down==1 or Input.Up==1) and mask.absy==190 then
            if #inventory==4 or (#inventory==3 and currentitem!=2) then
                currentitem = currentitem + 2
                mask.MoveTo(mask.x,mask.y-28)
            elseif #inventory==3 and currentitem==2 then
                currentitem = currentitem + 1
                mask.MoveTo(mask.x-264,mask.y-28)
            end
        elseif (Input.Down==1 or Input.Up==1) and mask.absy<190 then
            currentitem = currentitem - 2
            mask.MoveTo(mask.x,mask.y+28)
        end
    end
end