A simple game made in retro gadgets

game.lua

---@diagnostic disable: undefined-global
-- Retro Gadgets

local spriteFont = gdt.ROM.System.SpriteSheets["StandardFont"]
local sine : AudioSample = gdt.ROM.User.AudioSamples["sine.wav"]
local death : AudioSample = gdt.ROM.User.AudioSamples["death.wav"]
local win : AudioSample = gdt.ROM.User.AudioSamples["win.wav"]

local ticksPerSpawn = 45
local ticks = 0

local enemies = {}

local difficulty = 0.3
local difficultyCurve = 0.0002

local gameState = true
local score = 0


function update()
	if gameState == true then
		gdt.VideoChip0.Clear(gdt.VideoChip0, color.black)
		ticks += 1
		
		if ticks > ticksPerSpawn then
			ticks = 0
			local x = math.random(3.5, 13.5)
			table.insert(enemies, {x=x, y=-1})
		end
		for i, enemy in ipairs(enemies) do
			difficulty += difficultyCurve
			enemy.y += difficulty
			gdt.VideoChip0:DrawCircle(vec2(enemy.x, enemy.y), 2, color.red)
		end

		local rot = (((gdt.Knob0.Value+100)/2)/10)+3.5
		gdt.VideoChip0:DrawCircle(vec2(rot,45),2,color.green)

		for i, enemy in ipairs(enemies) do
			if enemy.x > rot-3 and enemy.x < rot+3 and enemy.y > 41.5 and enemy.y < 48.5 then
				gdt.AudioChip0:Play(death, 1)
				gameState = false
			end
			if enemy.y > 52 then
				table.remove(enemies, i)
				gdt.AudioChip0:Play(sine, 1)
				score += 1
			end
			if score > 999 then
				gdt.AudioChip0:Play(win, 1)
				gameState = false
			end
		end
	elseif gameState == false then
		gdt.VideoChip0.Clear(gdt.VideoChip0, color.black)
		if score > 999 then
			gdt.VideoChip0:DrawText(vec2(0, 20),spriteFont,"WIN",color.white,color.black)
		elseif score > 99 then
            		gdt.VideoChip0:DrawText(vec2(0, 20),spriteFont,tostring(score),color.white,color.black)
        	elseif score > 9 then
            		gdt.VideoChip0:DrawText(vec2(3, 20),spriteFont,tostring(score),color.white,color.black)
        	else
            		gdt.VideoChip0:DrawText(vec2(5, 20),spriteFont,tostring(score),color.white,color.black)
        	end
		if gdt.LedButton0.ButtonState == true then
			gameState = true
			enemies = {}
			ticks = 0
			difficulty = 0.3
			score = 0
		end
	end
end