-- Initialize GameData, cross-playthrough variables, for this level. This avoids conflicts with GameData of other levels.
GameData[Level.filename()] = GameData[Level.filename()] or {}
-- Initialize the checkpoint variable
GameData[Level.filename()].checkpoint = GameData[Level.filename()].checkpoint or 0

-- When the level starts, trigger a SMBX event by name, based on which checkpoint we are at.
function onStart()
	local checkpoint = GameData[Level.filename()].checkpoint
	
	if checkpoint == 0 then
		triggerEvent("startFight")
	elseif checkpoint == 1 then
		triggerEvent("startCP1")
	elseif checkpoint == 2 then
		triggerEvent("startCP2")
	end
end

-- In a SMBX event, trigger the events named below to collect a checkpoint.
function onEvent(eventName)
	if eventName == "collectCP1" then
		GameData[Level.filename()].checkpoint = 1
	elseif eventName == "collectCP2" then
		GameData[Level.filename()].checkpoint = 2
	end
end

-- Reset the checkpoint after winning
function onExit()
	if Level.winState() > 0 then
		GameData[Level.filename()].checkpoint = 0
	end
end