Tip: When determining a time limit, remember that players won't be as familiar with the level as you are. If you normally complete the level with the timer around 100, others might run out of time on their first try.
When you touch this block, it will warp you to a different OW/submap. This is a better version of my old block, I didn't know how to work with 16bit address then. I also explain how to get Mario to a specific point in the OW in the asm file.