I'm happy to say that I'm working closely with MrFish on this project.
So far, I've remade the tree, toad, and the rotating coins.

The tree's texture "follows" you and you can climb up the center of it (the trunk) and stand at the top.
The toad is just toad...lol.
The coins rotate, are nonsolid, make a noise when you walk through them, and give you 1 health and 1 ammo (limited to once every second to prevent spam). And yes, dretches (without jumping) can "hit" the coins from their current height off of the ground, although they can be lowered.
Also, each and every texture in the image is custom made, sans the weird green RC (some mod), the floor, and the skybox. Those are all there for testing and height reference purposes.