Goof: When Debbie and Mark arrive as Tinker is calling them from the phone booth, they can easily hear him. When Tinker says he left Speed Buggy's remote control unit at the garage, Mark's lips don't move when he says "So?"
Goof: When Mark pulls the lever to open the automatic door to help the gang escape Dr. Kluge's lab, his shirt collar is colored white instead of blue.
(At a phone booth where he's trying to contact Mark and Debbie unaware they've already arrived on their minibike)
Tinker: Hello, Mark? Listen, our only hope of finding Speedy is the remote control unit. But I left it in the garage.
Tinker: So, you gotta get it out here as fast as you can.
Mark: Where are you?
Tinker: I'm on old Orchard Road. Goodbye.
Mark: Goodbye. And hello! (hands him the remote control)
Tinker: What took you so long?
(After the gang is able to launch Kluge, Klinker, and the robot from the spring bridge)
Tinker: I'll bet this is the first moonshot without a rocket!
Debbie: And no moon. (The villains crash onto the top of a tree and are left hanging)
Speedy: (laughs) But a couple of loonies. (sputters and laughs)