Managed some better RNG in levels 3 and 4. Levels 1 and 2 were done by MarioAtWork (from his published run) and I couldn't find an improvement there. I think my 5 is suboptimal as well.
The RNG seems to advance based on how many times/frames you hit/hold a button. They also appear to have different effects. Like adding an A press is not the same as adding a right press which is not the same as adding both. I don't think B or Select do anything but I'm not 100%. I couldn't make heads or tails of exactly how it works, so I'm uploading this for MarioAtWork and others to improve upon in hopes that the actual functionality is figured out to be able to manip stuff exactly how we want.