Polarity of 5uF and 4.7uF caps. + is going to ground.
You have a signal that goes thtough a 4072, through a transistor, then a 4002, another transistor, (1G08 and Diode delay thaing).
Change to where the input of the 4002 looks at the 4072 output. The 1G08 should look at the 4002. The diode delay should look at the 4002. This will help you PCB layout and will help the signal quality.
In your delay thing.....the 10k should be removed. Cap is backwards. Remove the 1k.