Update v0.5.5

PLUMMET BOTS PROTOTYPE

v0.5.5 (WebGL Menu)

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++ADDED / FIXED:

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-Menu now functional in WebGL version so players are able to select a difficulty

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**KNOWN ISSUES**

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-Clicking any exit button will automatically cause the game to end and stop functioning. You will have to reload the webpage to be able to play again.

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