Yeah, some of the later levels were meant to be harder. I decided to have them all unlocked in case any of them were too hard. Most levels do have multiple ways to solve them, though! Something to keep in mind if you decide to try again :)
Besides the object throwing, was there anything else that gave you trouble? Was it figuring out what to do or trying to get past the guards?
Thank you for your feedback! I'm glad you enjoyed it.