I would class it as "not bad" you should get a type of upfront presentation due to the compact design. But being truthful I would build yourself another one of what you have just built for someone else.
It is much more "sophisticated" than the one you have .Has a circuit that wont be heavily beaten for a long time.and should be smooth although I realise "tube sound" in the one you have
helps to smooth over the cracks. If I was in your position I would start building it. good luck! and thanks for the link.