This one is a bit different than the other episodes of the Clums(y)Slime(y) series, but I like it a lot! I had fun coming up with viable bridges, and after completing it I feel like a clumsy engineer :3
I do believe that it should save your designs after you die and let you continue from where you left off. I also think that you should be able to delete a wooden board after placing it. These additions would make it a simpler and easier on each attempt.