The document discusses different genres of games including artificial life games, puzzle games, and games for girls. Artificial life games involve simulating biological processes and populations of organisms. A subgenre is artificial pets which focus on caring for and interacting with simulated pets. Puzzle games are primarily about puzzle solving and can incorporate puzzles into storylines. They need to be challenging but not too difficult. The document also discusses how computers allow for puzzles that would be difficult to create in the real world and enable features like automatically generating puzzles and enforcing rules. Finally, it notes that historically, few games were designed specifically for girls despite research showing differences in how girls play games.