I've done really similar builds to your layout - only difference is I used a 0.1uF cap instead of 0.01uF, and I use 2n3904 transistors. I'm not convinced that difference will be making the dolphin noises though...
Here's the schematic I have used with success, if you want to compare: http://www.muzique.com/schem/fuzzface3.gif
Here's the schematic I have used with success, if you want to compare: http://www.muzique.com/schem/fuzzface3.gif