A very interesting question

[HighStrike300]

Is there a level where you think there is a bug before you pass the level, and after you pass the level, you find that this is the way to pass the level?
160 that's it. At the beginning, I try to took my mouse away. I thought it was a cheating method, but only after I passed the level did I find that only in this way can I pass the level. I even gave feedback. I think I'm stupid and fool.

[Wesley]

You are not a fool. you are learning to think in different ways. it is good.

[Clarence]

I've intentionally made levels that are ambiguous as to how you completed them

a lot of people get fetched up when they try to replay it because they think they have the solution and suddenly they don't