Verification of 555 timer design
I agree with James and all the comments in the post + I would like to add something to the PCB design.

It is good practice not to use 90°/acute angles on the traces. It can make problems when etching the PCB and it does not look good :)
It is a 2 layer board right? For your GND make a ground plane instead. It improves the signal integrity.
Make your power traces thicker then signal traces. Looking at your design, I would make all traces thicker.
Consider mounting holes. If your design work, you may need a way how to use the PCB in your project without duct tape.