If you use color coded tilemaps you can only have 16 tiles! If you use some math and some programming magic, you can make a tilemap as big as you want, you just have to store the tiles as a bunch of numbers representing each tile type and then load and unload bits of it as the player moves around. I’ve done something like that before, though I haven’t really released it yet. You can take a look at my tilemap data extension to see how this might be done, and you could also try to understand this monstrosity which is that kinda unreleased project I mentioned. Maybe I’ll make a tutorial for this sometime!