Never played the original Suika game but from what I have seen the gameplay is very similar. To unlock scenes you play the Suika game to collect currency and food items based on how high you score. You can buy additional food items from the store with your currency, or unlock new girls in the gallery. Use the food items from your inventory to raise the selected girl's "Exp" and eventually you will unlock a scene in the gallery. All scenes can be unlocked in about 90 minutes or less if you are good at this type of game. Scenes are decent quality.