Couple of small fixes;

Moved the door at the start back to it's intended timings. It originally opened a little slower than expected due to a difference in timing between the editor and arcade, resulting in a crash leaving the entrance tunnel. The fix for this resulted in the door opening much earlier than intended. The new model - while not perfect, is closer to the original intent. Just need to figure out why it's invisible during the countdown now.

Relaxed medal times a bit from gold down. Gold's now achievable with a perfect on track run, and silver and bronze have been relaxed a bit to better encompass the first run times coming through on the workshop (ie, players can now realistically get at least a bronze on their first run).