I got the Its Rob! medal. Im not sure how i got it but ill put as much detail as i can. I used the superslide, omeglider, omega drive and dark matter. I also put the ramp as high as it will go.
After taking off i immediately hit the boost held it and ran out of fuel between 900 and 1000 feet in altitude. After passing 1000 feet a screen popped up and said "location confirmed sending supplies", i hit a glowing green box and my fuel tank was filled. I tried this again to see if it would happen again but it didn't. See if it will work for you and i hope this helped.
when i saw the core i told myself "oohh shiny! this should make me like 50x more powerful!" then after i got it i was like "oh my god horrible mistake..."
bad ending:go underground (under frozen zone) get gem.go back up frozen zone.find gem and boots.use it to get 2nd frozen gem.go to mountain (over ocean zone) for gem and flippers.go to maze (under pillar zone) and go: down left right left down.get gem and parachute.(with the endurance)use para to get gem in pillar zone and 2 gems in volcano. go underwater.get gem and find entrance to underground zone.get gloves.use it to get 2nd underground gem and one in jungle.id put the good ending too if there was room :/
alot of the comments complain about how hard the game is. go to youtube theres actually a rly good walkthrough to beat it. i just completed the game already.