🐾 Minor Update: Fix Home Page Bugs

[EDWIN1669086]

Context

While the Home page is good, there are some issues that we can fix to make this home page really good.

Problem

1. Our home page is supposed to not allow scrolling vertically or horizontally (ie. the home page should only be 100% both directions). However, in the horizontal direction, the home page exceeds the width of the screen, so it scrolls.
2. Make sure Mario (the character) is still standing on the grass despite screen-size changes.

Proposed Solution

1. Play with width, max-width, background-size, etc. Find a solution that fixes the horizontal scrolling issue.
2. Use media queries so that at a particular screen size, Mario will still be on the grass. In other words, make sure Mario's positioning is mobile-responsive.

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This is a 🐾 Minor Update