just completed. it's not so hard because you can start the level and think how to solve it. If you want to make it harder, you can also try to add (in the final part) a timer at the start of each level. What do you think about? So, i like the style, I like the idea! 5/5!
Now, how can i use the levers?
Chrome: https://chrome.google.com/webstore/detail/free-games/gechcfjojodafcpggkekfkkfpjacenno
Opera: https://addons.opera.com/it/extensions/details/free-games-2/
Click and Play!