Noisy Cricket - what did I fry?

[skateboardnorth]

Hey guys, I'm new to building electronics.  I built a Noisy Cricket and it worked perfect....until I think I fried it.  I had it sitting on my table(no enclosure) and I was playing it when it suddenly cut out.  Now when I turn it on and plug in, it makes strange noises.  I think it might have come into contact with metal(my table is full of junk) and probably fried something.  I just want to know what might have fried, and what should be the first thing that I change to get it working again.  

Here is the schematic : http://www.beavisaudio.com/Projects/NoisyCricket/DIY/NoisyCricket_Mark2_BuildGuide.pdf

Here's a video of it.  You can here a strange pulsing feedback  http://youtu.be/0jPiuSQYJj8

[jimilee]

The opamp should be replaced and then the trannies if that doesn't work, I'd try an audio probe if the opamp doesn't fix the issue.

[Fp-www.Tonepad.com]

the IC is most likely dead, I would also change C1 and the FET. Reverse voltage or shorting a supply bus where it doesn't belong usually destroys the components.