Changing old var to let (No declaration issues) #70
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What: This PR changes changes this project by changing var to let created best practice coding for this fun Tetris game allowing better memory management.


Where: In the index.html that hosts the game UI, had changed the var tables to let tables
Why: This matters because it removes function-scoped systems and is now block-scoped, let also prevents redeclaration and throws a syntax error when multiple declarations are declared, if a var is declared later after it is used it makes the variable return an undefined value. Asynchronous functions are now possible because multiple instances are created with let, block scopes are now easier to use in this project for future updates.
Verified: I verified this by playtesting the game. I expected the game to run smoothly. I observed the game running as intended no TDZ errors and smooth gameplay. Here are some screenshots:
Status: This PR is ready for review.