Oh yeah, there's probably room for triggers and moving elements. Indeed the lack of proper graphics hurts the read-ability badly, color combination could be a thing, maybe there could be also orange, purple and yellow platforms...
I believe you mean 4th and 5th level, since the third is pretty straightforward and serve only to expose the teleporting mechanic (between world bounds). They're not particularly well crafted, and I only differentiated them in difficulty because the 5th presents more pathes than the 4th.
Thank you playing my humble contribution and hosting the jam in the first place!