I recall playing a similar game earlier this jam – SpaceLanes, was it? Anyways, I do like the management aspect of this game with you having to balance each planet between giving and receiving resources, although after a while it did get a bit overwhelming with so many planets (which sometimes didn't have access to planets of both the different types). Apparently my final total was 31 and I peaked with 33 (which must mean my empire was on the verge of falling...)