Crossover

A solution by davidl (Time: 3.6s, Blocks used: 2)

A solution by Ray 'BLJ' Duck (Time: 3.3s, Blocks used: 1)

A solution by Ray 'BLJ' Duck (Time: 2.4s, Blocks used: 3)

A solution by dapr (Time: 5.5s, Blocks used: 2)

A solution by LiziCee (Time: 4.9s, Blocks used: 3)

A solution by Jab (Time: 1.6s, Blocks used: 1)

A solution by Pengu_Jentoo (Time: 3.4s, Blocks used: 4)

A solution by Cat (Time: 3.0s, Blocks used: 3)

A solution by Tom (Time: 2.0s, Blocks used: 1)

A solution by Grandpa (Time: 6.1s, Blocks used: 4)

A solution by Simon (Time: 5.9s, Blocks used: 5)

A solution by Maureen (Time: 2.7s, Blocks used: 11)