And, you say you're running out of level ideas? Think outside the box! You may think of a good one!
Here's an example: A time attack level! (There are rarely levels like this) The timer will start at 100 and you have to rush through everything without stopping. An example of one: https://www.youtube.com/watch?v=Sr31bQ25aYg (This video was somehow cut to only a few minutes)
Just try to make your levels stand out from most hacks. It may seem difficult but- it can be easy at times.
Also, if there are problems on the animation patch I gave you, it's likely because you patched too many patches from my collection. Remember that Super Mario Bros. is one of the games that have nearly-zero free space.