General Gameplay Tips
Hint 1: You can unlock a particularly skimpy top for your prepubescent looking witch. If you choose this, avoid applying for a job as a teacher or priest.
Hint 2: You unlock new bits of costume as you go along, so don't waste time when you fire the game up getting your look just right. Save that for after 30 minutes of play or so.
Hint 3: Don't go for every star on the screen. You can't reach them all, and you may accidentally run into an enemy.