You should focus on that this game keeps making the player moving, like, incentivizing them to jump to the upper platforms, as you did, in this game it is very easy to kill enemies in the upper platforms. But also, put another incentivator to go there down, like "the enemies drops life points when they die, so you need to go there down to recover life but carefully" or "the platforms are constantly moving and there are traps (that are not that annoying), but be careful anyway".
What i mean, is that your enemies dont need a great AI, you must only think about your options as a "not as good programmer as microsoft engineers" to decide The most Joyfull of the Options on your Reach
Believe me, it a real struggling to program stuff and i had fights with my mom who believes i am some kind of stressed lunatic, but you can always watch easy tutorials of everything you need on YUTUBE, so, lol!