Hey, interesting game, I like the concept of the moss attachments but I feel like the placement of the moss didn't matter, I would say you should continue this concept by making each attachment act differently when paired in certain shapes with others.
I also felt like I was too weak as the player, this may be a mechanic or perception issue I don't know. I would consider either bumping up damage or add some sort of screen shake or the like to feel more powerful.