First game ever works inside the Unity Editor, but not through the built Version

Hey everyone,

I made my first game today with a tutorial, but I encountered a problem when playing the build version:
(images can be found here: https://imgur.com/a/HQDw1Ld )

<blockquote class="imgur-embed-pub" lang="en" data-id="a/HQDw1Ld"><a href="//imgur.com/HQDw1Ld"></a></blockquote><script async src="//s.imgur.com/min/embed.js" charset="utf-8"></script>

In the first picture (the build version), the targets do not appear, and the score is not displayed, as opposed to the second picture (the editor version). I even set the Canvas for the score text to Scale with Screen Size and to Match Width or Height with a match value of 0.5. I don't think the issue lies with my code or scene configurations, but does anyone know how I could fix this? I'd really appreciate the help, and it'd save me a bunch of trouble down the road. I've attached my code too, for droppings and chortles.