Add some vines on the jungle wood to widen the margin of error.
This starting chain feels quite rough.
Have clearer indication that there is a vine here.
Water jump is a rough way to end the checkpoint, consider double heads or an alternative landing.
You can get the button from the wall so it isn't really necessary to have a timed section here; normal jumps would be sufficient
This jump is quite precise; consider using a slab instead of a stair.
This jump needs to be changed.
Nerf the flower pot->head jump.
This is skippable in versions above 1.8.
This is a tricky x-facing jump; you could either adjust it or move the next checkpoint back here.