Hi,
I can´t verify the design without datasheet. And for finding the datsheet we need to know the name of the IC.
Schematic issues:
* write the name of the IC in the schematic
* try to follow standard signal flow from left to right. Left side = input, right side = output.
* don´t try to use use the same pin order for the schematic symbol as in the package. Place the pins in a way to make the signal flow more easy and more straight forward.
Here: Left side: VIN, EN, GND. right side: VBST, SW, VFB
Klaus