The old music sounds just like the title screen and shop music from the original Learn to Fly if you travel at 90-150 mph! I guess that's why it's called old!
I found this glitch I like to call the double jump glitch. In order to pull it off, get very close to some slightly elevated ground, then jump in the direction you're facing, and, if you press the jump button again while you're still going up, you'll jump in midair! This is useful for getting to better heights without having to constantly upgrade how high you jump.
 "Run 2"){kind=icon}
 "Tangerine Tycoon"){kind=icon}
 "Learn to Fly 2"){kind=icon}
 "IntoSpace!"){kind=icon}
 "Elephant Quest"){kind=icon}
 "I Have 1 Day"){kind=icon}
 "Learn to Fly 3"){kind=icon}
 "Basic Idler"){kind=icon}
 "Basic Idle 2"){kind=icon}
 "Finite Moves"){kind=icon}