nice entry, you were able to add a lot of content within only 4 days! The timer looked a bit intimidating at first, because 30 minutes seemed like a lot but I needed around 15 minutes in the end which was more doable.
It might be nice to update the countdown system to a medal system, so if you want gold you’d have to make it within a 10 minute countdown, and afterwards it moves to 20 minutes for silver. That way if you still dont make it after 30 minutes you wont get game over’d but just no medal. That way you motivate the player to atleast finish the game even after 30 minutes.