Write your app as a classic Ruby script, just like you're use to.
Compile your app to native code on any platform.
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Install the gem and read the guides
Creating your first app
With Ruby 2D, you can create 2D applications, games, and visualizations with ease. Just a few lines of code is enough to get you started.
require 'ruby2d' # Set the window size set width: 300, height: 200 # Create a new shape s = Square.new # Give it some color s.color = 'red' # Show the window show