Keeps crashing but good

I like this app especially since Im a beginner at mahjong but when it loads it keeps crashing.. It was fine when I first started using it but now, it keeps blacking out and then returning my iPods home . Oh it sometimes crashes in the middle of a game too or at the very end when I win.

teppeilover about HKBG MJ 港男港女麻雀, v1.4