a red checkmark is bad to indicate failing, you should use a red X instead..
> Symbolism can be culture-specific. The check mark means correct or OK in many countries. In some countries, however, such as Japan, it can be used to mean that something is incorrect. Japanese localizers may need to convert check marks to circles (their symbol for 'correct') as part of the localization process.
Although to be fair, the tick (checkmark) that westerners use is not really the same as what Japanese to use to mark things as incorrect since they more closely resemble V than a tick.