Scarbourgh-born Kyle Johnson also contributed well with 15 points and five rebounds as he looks to impress GB senior men's coach Chris Finch ahead of their pre-Olympic training camp in Houston next week.
It was Bryan-Amaning though who stole the show but afterwards he praised his team-mates for the way they executed on both ends of the floor: "It was a great win tonight, we came out tough. We executed a lot better and played defence much better than last night.
"After half time we restricted them which was key and it was good for most of the players to get good court time. We've got a lot of confidence heading to tomorrow's game."
The Lithuanian side started the game brighter, and they got their deserved reward after the first ten minutes, edging ahead 18-17.
The GB Futures though hit back thanks to Bryan-Amaning, who finished the half with 15 points and seven rebounds to lead his side to a 39-29 at the half.
An even third period followed with frequent substitutions, as GB Futures led 55-45 and they held on despite a late fightback from the young Baltic opponents.
Coach Mokeski was happy with how his side played with great defence which he believed was the key to tonight's win: "We made significant runs in the game thanks to our defence, it's what won us the game tonight," he admitted.
"What has made these wins so rewarding is that these guys haven't had much time to prepare, they haven't had much time to train together, and add the fact that they're playing a Lithuania side who are well-trained and not to mention a country where basketball is the national sport, it makes these wins even more spectacular," Mokeski added.
With Saturday's game at Surrey Sports Park being open for the public to watch, West Sussex product Ben Mockford thinks that if the Futures play the way they did in their second victory then GB should make it a perfect three wins out of three.
"We just need to play the way we have been doing, not think about the previous two games and just focus on the task at hand and play as a team. We know if we let our guard down, then the Lithuanian team will punish us," Mockford explained.
Martynas Palikenas led the Lithuanians with 11 points with Darius Tarvydas supporting with 10.