推荐Gem在Ruby on Rails中构建一个非常简单的浏览器游戏

I am building a very simple game with Ruby on Rails. Two players are supposed to play a very simple game against each other (you can imagine a simple game like Tic-Tac-Toe). But it is expected that thousands of tic-tac-toe instances are being played at the same time. I want to know what is the simplest and fastet Ruby Gem that satisfies my needs. I have read about rubygame or gosu but they seem to be more complicated than what I need. I appreciate any advice. Note that I want to store all user moves and results of all games in my database.I am building a very simple game with Ruby on R