5:09 was my best time. Some sloppy bits. Biggest mistake was the boss. If you wait for the spotlight to go by you once after hitting the heart for the first time, you can two cycle it without ever setting off an alarm. Sub 5 is totally possible.
And... I improved on the last run almost immediately. Still has plenty of room for improvement (that first jump is kind of embarrassing and the last room is ugly.) I think if this were cleaner it could be around a 3:15. If I could find a way to get through the spikes without the float then we could get really low.