Fix getting killed by using too much memory

[hintron]

As explained in #49, my emulator grows in memory until it freezes the system and causes Linux to kill it with a "Killed" printout to the command line. This seems to be happening in both the VSCode debugger and Konsole, and this is after adding the title screen. What is going on? Has it always been like this? I feel like it was just working in VSCode a commit ago with no memory crashing...

[hintron]

It doesn't seem to be getting killed in Windows, but I do see it eat memory until all the memory on the system is used up (and the game doesn't work). However, under the debugger on Windows, the game works and there is no runaway memory problem... What is going on?