2D Side-View Physics Platformer Additive Objects



Hi guys! Im making a 2D Side-View Physics Platformer in which each player controls a ball. I wanted to know how to make the following items. I could make them myself but Im very limited on time. Also linking a YT video or an another thread or link about these could help.
I need the following things (2DBox side-View):
-Real Liquid(and also it would be good if its interactive)
-Some kind of spring traps. Must be visible.
-Trees using a physical joint for real results (Optional)
-A chain physical joint for ropes.
-Some cool main menu effects.