Muslims believe in all sorts of things: angels, devils, heaven, hell, and also the day of judgement. We also have deeds. There are two angels on our shoulders, one angel writes the good deeds, the other angel writes your bad deeds. And on the day of judgement, our deeds will be weighed. The more good deeds to bigger chance you go to Heaven. More bad deeds you have a chance to go to hell, but if you ask for forgiveness, I am sure Allah will forgive you, or he is not called All-forgiving.