Level "Unstable Bridge" (ID: 13078) by J
A solution by J (Time: 4.1s, Blocks used: +26)
A solution by AndyB (Time: 2.1s, Blocks used: +17)
I assumed you'd used overlapping blocks, so I did too. Now I feel bad...
A solution by AndyB (Time: 4.5s, Blocks used: +30)
A solution by Ray 'BLJ' Duck (Time: 2.4s, Blocks used: +15)
A solution by AndyB (Time: 7.0s, Blocks used: +17)