Kaze Emanuar’s Super Mario 64 Coins Grow hack rom takes the original game but adds a twist: Mario starts out tiny and can only grow by taking coins. The more coins he takes, the bigger he gets.
The game gets harder as Mario grows because you fall more easily, the camera has a harder time following you, and you risk being softlocked several times. To reset your height, restart the game (Game Over does not work). To make Mario normal size, collect 50 coins.