Obstacles

Obstacles are objects that can damage Blocks. They come in a variety of shapes, sizes, and damage output.

Behavior
Obstacles seem to deal more damage to Blocks the faster they are traversing. From the normal damage output, all the way to instantly destroy anything connected to that block. The rock does not suffer any additional damage.

Spikes, Bomb explosions, Jet explosions, Cannon projectiles, Turret projectiles, Mortar projectiles, and Energized Particles (what does the energized particle do?) can all deal extra damage to Obstacles, except for the Electric City obstacles, and the Construction Site wrecking ball.

Some obstacles can deal explosion damage, and electric damage.