Start multiplayer mode with a single bot as an opponent. Win a single race against the bot on any level.
Easy "Computer Crusher" Achievement
Start multiplayer mode with a single bot as an opponent. Win a single race against the bot on two different levels. Consider using the first two levels, as the third level is significantly more difficult.
Easy "Machine Master" Achievement
Start multiplayer mode with a single bot as an opponent. Win a single race against the bot on all three levels. Consider completing the levels from left to right. The third level is definitely the most difficult. Practice on the first two levels before attempting the third level.