There were supposed to be multiple mini-games; just didn’t have the time… So I understand how playing the same thing over and over got annoying for you. Although it’s important to note, the rules wouldn’t work without a forced mini-game on cycles where a yellow wasn’t rolled. Or at least it would make the game last much longer and the game’s long enough as it is.
Also, the loss of limbs do affect all contestants in the mini-game. Odds of them failing increase with each terror! That also applies to the player. If you get hit by a terror, the keys will fade faster! I’m sure there was a good way to visually hint at the others being affected, but time management’s hard, haha!