Nice job.
4x4 = 16 tiles, 64/16 = 4 bits, 16 powers of two = space for 0-65536 per tile.
So going up to only 2048 would leave some room even.
This one was posted a couple of days ago and it looks like it was surfaced by HNs algorithms. Since it's now basically a duplicate, it should probably be removed or hidden.
not_your_vase•2d ago
Nice job.
EmilyHughes•4h ago
4x4 = 16 tiles, 64/16 = 4 bits, 16 powers of two = space for 0-65536 per tile.
So going up to only 2048 would leave some room even.