Continuity mistake: When Crapgame makes a phone call after speaking to Oddball, his grip on the receiver changes between shots. (00:37:40)
Continuity mistake: When Joe is talking to the Captain about having a guide for the town, the Captain's chin strap on his helmet is twisted or untwisted depending on the shot. (00:12:30)
Answer: It's a Yugoslav Soko 522 Ikarus.