Repeal Crystal Beam, Spin-up Spinner, Spin-down Spinner and Wheel Rotation.
Amend Movement by replacing all instances of "2d6" with "2d4".
Remove "Oil Spill" from the list in Hazard.
Delete all spaces.
For each integer N between -19 and 19 inclusive, create space N with type Blank.
Create a loop from space 1 to space 0. Create a loop from space -19 to space 0.
Change the type of space 0 to Crystal, Spaces -18, -8, 6 and 9 to Garbage Pile, -14 and 14 to teleporter, -16, -11, -9, -6, -2, -1 and 17 to Hazard, -15 and 10 to Utility, -10 and -5 to Treasure, 5 to Dance Pad and 15 to Disco Ball. Change the type of space -3 to Boulder Trap with boulder path {-4, -2, -1} and safe space on 0. Change the type of space 19 to Boulder Trap with boulder path {18, 17, 16} and safe space on 15. Change the pseudo-type of space -15 to Crystal Forge, -10 to Crystal Orb, -6 to Geyser, -5 to Casino and -2 to Thin Ice.
For each player, take the Identifier of the space they are on and halve it. If the magnitude of this is less than 10, round the value up. If it is greater than 10, round the value down. If this does not correspond to an identifier of a space, consider the direction/sign of the value. If negative, set it to -8, if positive, set it to 12. This value is their new position.