Instructions Fail

My baby girl would only go to sleep if i had this music maker working. The batteries died at the worst possible time, so I was desperate to get some new ones in there. I obviously did not read the instructions when trying to open it, because if I had, I might have known about the 2 screws holding the cover on. It got to a point where I thought "there is no way I'm doing this wrong - it must be a defective cover." Anyway, I totally destroyed the thing.