Great little game. I love things like this. The arcade vibe is real and in the best way possible.
I did have some thoughts about the control scheme--I'm not sure I care for the rotation mechanic. It felt very hard to control and that detracted from the experience for me, which is a shame since everything else made me want to stick around longer. I would have preferred true direction arrow keys that suggested the direction the worm should turn. Something a joystick could control, to keep the arcade feel perhaps.
That aside everything is top notch. I would throw so many quarters in a machine that had this on it.