Sugar rich snacks and carbohydrates foster the proliferation of oral bacteria and the formation of cavities. Therefore the brushing should occur soon.
However, acids like citric acid (i.e. lemon) or phosphoric acid contained in soft drinks (i.e. Fanta) soften the enamel of the teeth. IF the teeth are brushed immediately after eating this enamel may be scrapped away so it’s better to wait at least 30 minutes (1 hour better).
The brushing sessions should last 2 full minutes.
It is recommended to brush twice a day. Once in the morning and once in the evening. If there is no possibility to wait 30 minutes /1 hour after a meal, it may be better to brush teeth before eating.
When game developers focus too much on the commercial launch, it is very easy to underdeliver with the product, especially now that the bar is high and more is expected from newer technologies.