Original source code is available on https://www.speedrun.com/katamarireroll/resources . This script is patched for `start` and `reset`.

katamari-reroll.asl

state("katamari") 
{
	byte levelID: "mono.dll", 0x0265110, 0x90, 0x10, 0x28, 0x408;
	int frames: "mono.dll", 0x00265110, 0x90, 0x30, 0x20, 0x50, 0x51c;
	float size: "PS2KatamariSimulation.dll", 0x16d77c;
	int stage: "UnityPlayer.dll", 0x13FB8F8;
	int newGameDialog: "UnityPlayer.dll", 0x0144F148, 0x14;
	int newGameDialogValue: "mono.dll", 0x00268698, 0x190, 0x38, 0x268, 0xA40;
}

startup
{
	settings.Add("splitOnMAS", true, "Split after MAS1-9");
	settings.Add("splitOnBear", false, "Split after Ursa Major", "splitOnMAS");
}

init
{
	print("Init! splitOnMAS=" + settings["splitOnMAS"] + ", splitOnBear=" + settings["splitOnBear"]);
	refreshRate = 30;
	
	vars.LEVEL_ID_URSA = 17;
	vars.STAGE_ID_RESULTS = 114;
	vars.STAGE_ID_OVERWORLD = 29;
	vars.STAGE_ID_MAS1 = 1;
	vars.STAGE_ID_MAS9 = 9;
	
	vars.onResultsStage = false;
	vars.alreadySplitAt300m = false;
	
	vars.NEW_GAME_DIALOG_OPEN = 10167;
	vars.NEW_GAME_DIALOG_CLOSED = 10162;
	vars.NEW_GAME_DIALOG_VALUE_YES = 257;
	vars.NEW_GAME_DIALOG_VALUE_NO = 1;
}

start
{
	// On my PC, `newGameDialogValue` is doubtful...
	// Ignore it!
	if (old.newGameDialog == vars.NEW_GAME_DIALOG_OPEN && current.newGameDialog == vars.NEW_GAME_DIALOG_CLOSED) {
		print("Let's Start!!");
		return true;
	} else {
		return false;
	}
	return old.newGameDialog == vars.NEW_GAME_DIALOG_OPEN &&
		current.newGameDialog == vars.NEW_GAME_DIALOG_CLOSED &&
		old.newGameDialogValue == vars.NEW_GAME_DIALOG_VALUE_YES;
}

reset
{
	if (old.newGameDialog == vars.NEW_GAME_DIALOG_OPEN && current.newGameDialog == vars.NEW_GAME_DIALOG_CLOSED) {
		print("Restart");
		return true;
	} else {
		return false;
	}
}

isLoading
{
	return current.frames == old.frames;
}

split
{
	if (current.stage == vars.STAGE_ID_RESULTS) {
		vars.onResultsStage = true;
		return false;
	}
	
	if (current.stage == vars.STAGE_ID_OVERWORLD && vars.onResultsStage == true) {
		vars.onResultsStage = false;
		
		if (settings["splitOnMAS"] && 
			current.levelID >= vars.STAGE_ID_MAS1 && 
			current.levelID <= vars.STAGE_ID_MAS9
		) {
			return true;
		}
		
		if (settings["splitOnBear"] && current.levelID == vars.LEVEL_ID_URSA) {
			return true;
		}
		
		return false;
	}	
	
	if (!vars.alreadySplitAt300m && current.levelID == 10 && current.size >= 30000) {
		vars.alreadySplitAt300m = true;
		return true;
	}
}