File:Crash Bandicoot Prototype, Part 10 Up The Creek-1

Description
Many boxes are missing here, including most of the checkpoints. That hard part at 1:55 never happened in the finished game, and there's obviously more than one bonus round token.

At 1:22 there's a TNT and bounce crate on the ledge to the left in the finished game, activated by the switch at 1:27. I forgot to go back there, so all I can say is that the TNT is missing. The extra life under the bridge is still there.