Originally posted by Emerald Shell
Reducing the amount of them will decrease risk of potential slowdown.
I'm fairly sure that the SA-1 would be able to handle those. The real problem here is what you said about them overwhelming the player and in a not engaging way too, because from the looks of it, they're being placed for the sake of it instead of actually designing around them and taking advantage of each of those enemies' own patterns and quirks. There are too many coins too and a lot of the coin trails aren't really necessary, because Mario's jump trajectories seem obvious enough where they were placed.