I thought that was part of the puzzle, I was able to use the sand bank as well. It seems I got stuck in the first task of killing the robot as apparently it was dead and alive and nothing else happened. I've seem that with one of the other robots further in the map. In general, great idea end implementation.
Viewing post in Soulless jam comments
I do apologize about the robot being both dead and alive. I honestly don't know why that happened. I only ever had it happen once in my own playtesting and it never happened again so I assumed whatever I did at the time fixed the issue, but I guess not. Its a very rare bug that I haven't been able to replicate since, but I'll try to find a fix for it and update the game after the game jam voting ends.