Naval Clash Game With 16x16 NeoPixel Matrix WS1812B - Random Ships Arrangement

Other Hardware LEDs and Multiplexing
12

What did you change that fixed the problem?

There are only 1024 possible seeds for random? Oh, wait, you mean if you use analogRead() from a floating pin as the seed?

This could be increased:

void setup() {
  ...
  unsigned long seed = analogRead(A0);
  seed = seed << 10 | analogRead(A0);
  seed = seed << 10 | analogRead(A0);
  randomSeed(seed);
  ...
}