So, I was thinking how useful it would be for mini games and things like that, if it were possible to insert a time limit ASM routine into the engine of a ROM. I thought about whether any of the GBA games already had a time limit function in them because I thought it would be something they would use at one point in one of the games; the first thing that came to mind was the berry blender but I'm not sure. If it is possible to insert a routine like this then it would be so once the time limit finishes the player warps or something like that and also so that the time remaining until zero is shown at the top of the screen like a countdown? Does anyone have any thoughts on how it may be possible to create an ASM routine like this?