```ruby
require 'gosu'
Dir['./lib/modules/*.rb'].each { |file| require file }
Dir['./lib/[^_]*.rb'].each { |file| require file }
Dir['./lib/_*.rb'].each { |file| require file }

Window.new.show if $0 == __FILE__
```

Change single quotes to double
user
```ruby
require "gosu"
Dir['./lib/modules/*.rb'].each { |file| require file }
Dir['./lib/[^_]*.rb'].each { |file| require file }
Dir['./lib/_*.rb'].each { |file| require file }

Window.new.show if $0 == __FILE__
```
assistant