Removed pygame-menu and code cleanup

Added game class

data/models/snake_head.svg

@@ -23,9 +23,9 @@
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      inkscape:document-units="mm"
-     inkscape:zoom="0.72426347"
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+     inkscape:zoom="1.4485269"
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@@ -55,9 +55,22 @@
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+       transform="translate(-30.914667,30.458026)"
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+       style="fill:#000000;stroke:none;stroke-width:0.264583"
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+       cy="103.74908"
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 </svg>