Answer by chasly - supports Monica for How do slime supports their weight and reach higher places?

Cytoskeleton

"... they [cells] are highly structured in much the same way as ourown bodies. They have a network of filaments known as the cytoskeleton(literally, “cell skeleton”), which not only supports the plasmamembrane and gives the cell an overall shape, but also aids in thecorrect positioning of organelles, provides tracks for the transportof vesicles, and (in many cell types) allows the cell to move.

https://www.khanacademy.org/science/biology/structure-of-a-cell/tour-of-organelles/a/the-cytoskeleton

Slime mould

Here is a time-lapse video showing exactly what you want.

https://youtu.be/VJkJbM3y5R4

...slime molds ... form a structure called a pseudoplasmodium thatmoves over logs, bark, and soil at a rate of one inch per day. Whenfood is particularly abundant, the slime mold changes. Some of theslugs form a base, while others become spores and stalks.

https://decodedscience.org/the-blob-attacks-gooey-slime-mold-is-an-example-of-leaderless-motion/#:~:text=When%20slime%20molds%20get%20together%2C%20the%20party%20begins.,a%20base%2C%20while%20others%20become%20spores%20and%20stalks.

Here is another video. It shows that slime moulds can creep vertically upwards. https://youtu.be/Nx3Uu1hfl6Q