Sure! Here's an example implementation of a game called "Blackie's Boss Fight" using JavaScript and pictograms in a single HTML file. You can play the game on a smartphone by clicking on the black emoji character to begin the boss fight. Blackie will shoot black lasers, and you need to hit him with all four books to defeat him.
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Please note that due to the limitations of this text-based platform, the emoji and pictogram representation may not be visible accurately. However, when you run this code inside an HTML environment, the emojis and pictograms should appear correctly.