Indication of invalid style about flexboxfroggy HOT 2 OPEN

Eventually I'd love to parse the answers and add some tailored, localized hints for common errors (like row-reversed). I'm collecting some analytics data on that.

In the meantime, minor improvements could still be made to the feedback. There's subtle feedback in that the "Next" button changes from a disabled to active state. Maybe the color could also be changed from red to green when the level is solved.

from flexboxfroggy.

I did notice that the next button changes state, but I wonder if that is too subtle of a feedback. (Especially for beginners.) Which is why I think some way of highlighting the offending line would be helpful.

from flexboxfroggy.