I hate to be a junior river policeman, but there are some issues with the waterways in this map. There are two separate bodies of water, Rim Lake and the unnamed lake next to it, which have no visible outlets (this implies the water either evaporates or sinks back into the ground as fast as new water is added, both of which are rare for lakes). If showing where the water flows out is not the point of this hex map, that's okay.
But the rivers in the Mystysra/Moole Delta region don't really work. The river sources on the northeastern shore of the bay follow along the coast for a while, which must mean that the land between it and the bay is pretty high, and I dunno whether that works here. Then when all the rivers come together, it splits into five different rivers that drain into the bay. Rivers simply don't do that. If the river does have a delta, it will form in the classic triangular shape, not a peninsula