Did some mucking about. First of all, you can easily cheat engine by scanning on the default 4 byte and your money (400 at start if I remember), then buying a cheap drink, putting the new value in and hitting Next Scan. Drag the lone value on the left to the bottom part, change it to like 300,000 then buy or sell to update your money.
There ARE scenes with the shopkeeper and the casino lady, a Footjob and Boobjob respectively. You have to sell 5 maxed out Tamagos to the store to raise a number at top left to 5 then click on her. For the casino you have to play the weird matching guess game and perfect match her 5 times then click on her. Each scene lowers the number by 1.
If you want to do it legitimately like I did, here's two things I noticed about the casino game; 1) She almost always uses the 1st digit twice in a row, and 2) the 2nd digit is never the same as the previous game. So if she opens up with 3-4 and the next game starts with 3, you know it'll definitely be 3-1 or 3-2.
If you can't be bothered though, here's a cheaty save with 999 uses of both of them, a random maxed Tamago and a boatload of money. It's on slot 3!