Finally got the restaurant! It was probably the most crazy combo of starslides I've ever had. Got to the wizard's eye starslide and was able to fall from the planet above that down, get a jump off, hit the end of a slide at the moon, got back in the water, got the tailslide off at 0:00 and starslided all the way to 2232.57m 156.27 m/s 158million final score. Now I can never play this again! woot!
search for *.sol and you'll find your old saved game
next make a new saved game today, then move your old file into the new file that the game will create.
For the buttons: look at the big button, then go back through and turn all the little buttons that color and leave, the big door is now open