The Costa Rica striker secured a 1-0 victory over Italy, which sends his side into the knockout round of the World Cup.
The Central Americans secured a route out of Group D thanks to shock wins over the Azzurri and Uruguay in their opening two games, with the Fulham man scoring the decisive goal against Cesare Prandelli's squad Friday.
Ruiz has hailed his teammates' work rate in the 1-0 triumph over Italy and was quick to thank those who had supported the team.
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"I cannot explain the emotions I am feeling right now," Ruiz told Sky Sport Italia. "We suffered so much in this game. I dedicate the goal to my family. It's incredible to score at a World Cup.
"We had dreamed of this moment, even though we knew people didn't believe in us. We qualified ahead of teams much stronger than we are, so this is all a dream come true. We thank all those who did believe in us, as we've achieved something extraordinary considering our country is so small."