Thanks a lot for the kind words! We're aiming to improving the pacing of their relationship.
There are 4 endings to the game. Three of the endings end in a Game Over screen. The best ending can be achieved by telling Froyo about the mosquito needle during the third case in the classroom. The endings too, are a bit rushed so we're aiming on fleshing them out in the future.
We're really glad you enjoyed the game!