This game has some big potential. I can see that there might just be a ginormous amount of girls in this game to pick from once this gets some more time. I can also see there's a "card shop" planned, so there will definitely be bucket loads of content for this game. It's also easy to learn once you get a game or two in.
Basically it goes a little something like this:
"Squeezing" is the main way to get points to play more powerful cards and guardians with. If you've ever played a TCG like Magic the Gathering, you'll understand the guardian mechanic. Just play a guardian, and they'll protect you from your opponent squeezing you with their girls to get points off of you. Guardians fight eachother in the middle in typical MtG style: Both deal damage to eachother when engaged in combat, Armor subtracts from the damage, if the green number reaches 0 then the card is gone. Your girls can help your guardians fight if you're willing to shave off some Energy (which is your HP) to activate the bonuses. If you have no guardians, then your opponent can use your energy, as said before, to get points, but they can also use this to give their guardians bonuses. Big Breasts upgrades any titfuck squeezing from taking 1 energy to taking 2. Breastfeeding increases the milk produced by a girl, which can let you restore energy in the formula (x/2=y), where "x" is the level of milk, and "y" is the energy given. As you can probably tell, you can't do breastfeeding if you only have 1 milk level, as that would give less than 1 energy. Hypnosis lets you steal your opponent's girls. This lets you use them for even more bonuses or points. It's recommended you get two or more types of girls in your deck instead of just 1 type of girl so you can make more elaborate plays. Also, you should definitely get the energy drink in if you want to play on the safe side. Keep in mind though, that you can only have 40 cards in one deck. These 40 cards should be primarily taken up by Guardians so you aren't getting quite literally sucked dry of your Energy. If I were to make any more pointers on deck building, you DEFINITELY do not need Press and "The day the stars fell". These cards seem to only hurt you instead of helping you, with Press giving an opponent one of your cards, and "The day the stars fell" removing all guardians from play (yes, ALL of them).
But, of course, if you don't care about the gameplay, you can go to Squeezing edit (second option after the main menu) and view all the animations with every available modifier.