PICO-8 is a "fantasy console" with an arbitrary limitation to imitate the real world console in the past century. While it uses Lua as a scripting language, it

PICO-8 is a "fantasy console" with an arbitrary limitation to imitate the real world console in the past century. While it uses Lua as a scripting language, it comes with very severe memory (<2MB) and code size (<8K tokens) limitation so that it is actually akin to programming in slightly more powerful BASIC and PEEK and POKE (yes they are actual names). To elaborate what happens when the buffer overflows... The official README explains that map (normally sprites) starts at 0x2000 and some other data starts at 0x3000. Therefore it will start overflowing other data, and depending on what you expect in those area, it may or may not break the game. The entirety of PICO-8 is intentionally constructed in this way to give its look and feel.