This is a great list, I've tried to order them into what I think would be easiest to hardest, so you can work through all of them whilst improving your skills!
If you think the list could be ordered better let me know and I'll edit it!
1:Pong
2:Minefield
3:Tic-tac-toe
4:Memory Puzzle
5:Simon
6:Sliding Puzzle
7:Duck Hunt
8:Yahtzee
9:Maze
10:Typespeed
11:Lunar Lander
12:Nibbles
13:Katamari Damacy
14:Tron
15:Asteroids
16:Arkanoid
17:Flood It
18:Quoridor
19:Space Invaders
20:Scrabble
21:Othello
22:Quarto
23:Fruit Ninja
24:Tetris
25:Minotaurus
26:Connect Four
27:Missile Command
28:Abalone
29:Sokoban
30:Dr. Mario
31:Kirby’s Avalanche / Puyo Puyo
32:Checkers / Draughts
33:Pipe Dream
34:Blackjack
35:Grid Lock / Traffic Jam
36:Last Stand
37:Bloxorz
38:Bejeweled
39:Zoop
40:Rampart
41:Mancala
42:Snood / Bust-a-Move
43:Scorched Earth / Worms / Gorillas / Angry Birds
44:Stratego
45:Risk
46:Go
47:Diner Dash
48:Fire ‘N’ Ice
49:Chess