Game 1 - Flappy Bird (saves high score)
http://www.agame.com/game/flappy-bird

Game 2 - Tetris (doesn't save high score)
http://www.freetetris.org/game.php
After it displays your score, open a new window to play again.

Game 3 - Pac-Man (doesn't save high score)
http://freepacman.org

Game 4 - Cursor Thief (doesn't save high score)
http://www.vivalagames.com/play/cursorthief/

Game 5 - Breakout
http://thesimplearcade.com/play/breakout.html

Game 6 - Helicopter (saves high score)
http://thesimplearcade.com/play/helicopter.html

Game 7 - Crush (doesn't save high score)
http://www.freearcade.com/Crush.flash/Crush.html

Game 8 - Asteroids (saves high score)
http://my.ign.com/atari/asteroids