Hmm, yeah I guess so, although Tile Tops have a regular arrangement with symmetry and such, I'm not sure as to how organized Sprog is in its structure.
Plants are somewhat easier to make look alien than animals (especially when some of them can hop about ^-^). I think one way to do it is to mix in some animal bits and put them on a stick. For example, some Fentil plants have an active heart and vessel pump system for water, some have a lung which breathes in and out and others have leaves that resemble insect wings. Then just go to town on the fancy visual stuff, which generally ends up being able to worked in as practical.