Great Game!
I like this game. A lot of memories in here from when I was 8 and first played it.
Now, to why it's good. It's so fun! I find that the most fun part is when you're at work and those random 'chance-cards' pop up. I always go with my instinct on them so it can end up failing pretty bad.
About the art, I liked it. The lines were smooth, the eyes were cool and the chibis were cute. You draw really pretty girls without going over the top.
I liked Katie's pink hair and eyes, her eyes are so shiny, it's cute, and her hairstyle... Amazing. I also liked her shyness when you first meet her, it's simply adorable. Also, a hint - I noticed, the smarter you are, the more she likes you. With Erika, the stronger you are.
As you get more intelligent, your work pays higher, and you have higher promotion chances. I like that.
Overall, great game.