Hello,
Sorry for late reply. I was having trouble opening few website for past few days and itch.io happened to be one of them.
Are you playing the latest version 0.2.1? I know this problem may occur in 0.2 because I didn't updated the lever numbers in that version.
I have tried that level several times and I was not able to encounter the bug related to levers.
Please try downloading the game again as AzraelTheAnimhilator suggested. You will not lose any progress as long as files located in 'C:\Users\USERNAME\AppData\LocalLow\LAGS\Haileys' Treasure Adventure' are not deleted or modified.