Laughtorio

Somebody needs to make all the laughs in the world, and that somebody is you! 

Place blocks on the level to transport funnies to the people, then press play.

Select blocks by pressing numbers 1-4 or clicking from the sidebar.
Clear the selected block by clicking on the same block in the sidebar, or ESC.
Use R to rotate a block.
Use X to remove a block while hovering over it (when you don't have a block selected).

During play, you can switch the junction direction by clicking.