Gravity with a good jump from the sand can reach the Solid Rock Maze region.

Requires:

"Gravity"
"canPlayInSand"
{
  "or": [
    "HiJump",
    "canSpringBallJumpMidAir",
    "canWalljump",
    "canIBJ",
    "canGravityJump"
  ]
}