thingsiplay, 7 months ago (edited 7 months ago)

Here is a very good technical video about this topic: The Bad Jump Design and 30 FPS Gravity of TMNT (NES) - Behind the Code

Edit: I linked the wrong video. Here is the one I wanted to link, from the same guy:
The Broken Water Level of Teenage Mutant Ninja Turtles (NES) - Behind the Code