help to Optimize my Cadsoft Eagle work

Here I am presenting my first serious practical work in Cadsoft Eagle
with a very simple circuit.
See the attachment.
Help to optimize my work by pointing any faults (if have) in my work.

I Used the schematic as reference to place components.
I used wire width 0.024
Is it enough for etching ?

Four wires are drawn on component side. But this is one sided board.
So I will connect four direct wires (without soldering) on component side between desired points.
After auto route (Preferred directions 1 Top-N/A, 16 Bottom-*) these four
wires remain unrouted. Its manual routing on solder side is so tedious as of crossings.
So I manually route them through component side. That is wire jumps.
Does it is a good practice ?

Does there any need for turning on/off any additional layers on component and solder side ?

I heartily welcoming all opinions to improve my skill in Eagle PCB fabrication.

schematic, board files

.sch and .brd files wouldn't support on this forum.
Otherwise I can attach them as there is a lot missing from the board pdf.

Hi vinodquilon,

LEDs 1 through 4 have no current limiting resistor. You'll either fry the LEDs or the BC547 transistors (in the worst case both).

When posting a schematic for possible recommendations just zip and attach it.

Boncuk