Wait a second, are you using the unit of measure deviations of bytes in your abbreviations as opposed to standard numbers? After 8 hours and an exhausted mind it all clicked into place...
Bug: When the game saves the maximum distance of your projectiles seems to be reduced, causing them to fall back to earth at later levels when they consistently hit otherwise.
 "Learn to Fly Idle"){kind=icon}
 "AddictivePhysics Demo"){kind=icon}
Giga, as in gigabyte, short-scale for billion.