In a few levels like the cave or the final level we make use of ladders. Like in Alex Kidd the screens are connected in a number of ways, so there's mostly more than one way out of a screen than simply always walking to the right.
We needed a climbing animation of our main character - the ominous sourceress. Here it is. One or two frames more than the enemy sprites of late 😁
If you are wondering why this sprite doesn't have a higher fidelity, it's because there's all sorts of restrictions when doing a ROM hack. In particular with Alex Kidd in Miracle World the climbing animation reuses tiles in the different animation frames. That's why for example I could not alter the hood from one frame to another.
Welp, that's one of the drawbacks of doing a ROM hack. That's a price we are willing to pay though, as we got lots of other things for free in return.