Slight changes to wordings in the explanations.

index.html

@@ -45,7 +45,7 @@
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     <p>CUT is a family of fast, efficient, single-image upscaling algorithms supporting a wide range of games from retro to modern. They are powering the HD mode of <a href="https://github.com/Swordfish90/Lemuroid">Lemuroid</a>.</p>
-    <p>Use this demo tool to see and compare results on the screenshots below.</p>
+    <p>Click on the thumbnails below to compare the effect of the left and right filter.</p>
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