Diffusion

This was not easy to see. 
I first got stuck at 49, but then got closer and closer, each try, until I reached 35. Very nice solution.

Hakugin

Hecate

Very nice structure. I had 125, before finding Rising's 121.

Picking up a tungsten cube

In one of my tries I came over 1000 moves, but two blocks were always ''sticking'' and seemed impossible to stop it from happening (not always the same two blocks). 

Then I suddenly saw what to do. And then it seemed easy. :)))

Great one.