in star-1 there are 2 draw bridges that cost you about 2 seconds, but there is a way to skip the second one! All you have to do is jump from the brick containing the switch, and you jump over it

I believe you can actually skip both if you use the raccoon suit

I tested it this morning, since it's on the other side of the bridge you lose to much height before reaching it

This has been known for a while btw