8-Bit Slime

Results 2 issues of 8-Bit Slime

It seems like that Fontdue's rasterized characters are just a little smaller than that of Firefox or Chrome. Also, using the [Roboto font](https://fonts.google.com/specimen/Roboto), the lowercase 'i' is very noticeably different....

enhancement

As the title implies, instead of a macro defining a constant 16 by 9 ratio, use the user's monitor aspect ratio for rendering. Perhaps the current monitor that the game...