Computercraft Test-Programm for game-utils library

if fs.exists("game-utils") == false then shell.run("wget https://raw.githubusercontent.com/Terandox-The-Pineapple/TRX-Librarys/main/game-utils.lua game-utils") end
local game_utils = require("game-utils")
if fs.exists("table-utils") == false then shell.run("wget https://raw.githubusercontent.com/Terandox-The-Pineapple/TRX-Librarys/main/table-utils.lua table-utils") end
local table_utils = require("table-utils")

math.randomseed(os.time())
local my_back = game_utils.add_background("my_back")
for x = 1, 51, 1 do
    for y = 1, 19, 1 do
        if x == 1 or x == 51 or y == 1 or y == 19 then
            my_back.render[x][y].color = colours.green
        else
            my_back.render[x][y].color = colours.red
        end
    end
end
game_utils.change_background(my_back)
local player = game_utils.add_player(2, 2, "player_1")
local enemy = game_utils.add_enemy(50, 18, "enemy_1")
local buffer = false
player.render[2][1].color = colours.black
player.render[2][2].color = colours.black
player.render[2][3].color = colours.black
player.render[1][2].color = colours.black
player.render[3][2].color = colours.black
enemy.render[1][1].color = colours.pink
local controlls = game_utils.add_controller("controlls")
game_utils.add_controller_key(controlls, "Quit", keys.q, function()
    controlls:stop()
    term.setBackgroundColor(colors.black)
    shell.run("clear")
    print("Programm finished")
end)
game_utils.add_controller_key(controlls, "Up", keys.up, function()
    buffer = "U"
end)
game_utils.add_controller_key(controlls, "Down", keys.down, function()
    buffer = "D"
end)
game_utils.add_controller_key(controlls, "Left", keys.left, function()
    buffer = "L"
end)
game_utils.add_controller_key(controlls, "Right", keys.right, function()
    buffer = "R"
end)
local e_move = "L"
local bullets = {}
local c_bullet = game_utils.add_other(1, 1, "c_bullet")
function c_bullet:fly()
    if self.posY > 2 then
        if self:collision(player) then return hit() end
        self:undraw()
        self:moveUp()
        self:draw()
        if self:collision(player) then return hit() end
    else
        if self:collision(player) then return hit() end
        table_utils.removeItem(bullets, self)
        self:undraw()
        self:destroy()
    end
    return false
end

c_bullet.render[1][1].color = colours.purple
player:draw()
function game()
    os.sleep(0.1)
    if moveEnemy() then return true end
    if moveBullets() then return true end
    test_shot()
    local sizeX, sizeY = player:getSize()
    if buffer == "U" and player.posY > 2 then
        player:undraw()
        player:moveUp()
        player:draw()
    elseif buffer == "D" and player.posY < (19 - sizeY) then
        player:undraw()
        player:moveDown()
        player:draw()
    elseif buffer == "L" and player.posX > 2 then
        player:undraw()
        player:moveLeft()
        player:draw()
    elseif buffer == "R" and player.posX < (51 - sizeX) then
        player:undraw()
        player:moveRight()
        player:draw()
    end
end

function moveBullets()
    for index, bullet in pairs(bullets) do
        if bullet:fly() then return true end
    end
    return false
end

function moveEnemy()
    if enemy:collision(player) then return hit() end
    enemy:undraw()
    if e_move == "R" then
        enemy:moveRight()
        if enemy.posX >= 50 then
            e_move = "L"
        end
    elseif e_move == "L" then
        enemy:moveLeft()
        if enemy.posX <= 2 then
            e_move = "R"
        end
    else
        controlls:stop()
    end
    enemy:draw()
    if enemy:collision(player) then return hit() end
    return false
end

function test_shot()
    value = math.random(8)
    if value == 1 then shoot() end
end

function shoot()
    local bullet = c_bullet:new({ posX = enemy.posX, posY = enemy.posY - 1 })
    table.insert(bullets, bullet)
    bullet:draw()
end

function hit()
    controlls:stop()
    term.setBackgroundColor(colors.black)
    shell.run("clear")
    print("Hit")
    return true
end

controlls:start(game)