tbh at first the controls were in an (unintentionally) predefined order (host would be up, p2 would be down, p3 would be left, p4 would be right), and the random allocations were a somewhat last-minute bodge. And due to how the overall allocation stuff was bodged, and how little I actually know about how to really use the MLAPI stuff, I wasn't able to work out how to display only the client's direction to the client in question. And with the additional powerups/pickups, I wasn't really sure what else would really make sense in context of this game (or even how the players would be able to use said additional powerups)
I appreciate the suggestions though.
Either way, I'm glad you enjoyed the game, and I'm also glad that you managed to work out how to play the game in multiplayer as intended.