Hey ! Of course you can use the screens, I don’t plan on claiming intellectual property on these patterns... at least not yet 😏 (they are a bit small though). The limited palette does the job, and this kind of limitation (like in game jams) really drives creativity. So yeah, I agree with you, restricting color choices is a good idea. Plus, you picked a super cute palette. However, a non saturated pink and yellow could be a cool addition I think...
Here, I made a new batch, your new screenshots tickled my creativity, I aimed for some top down view landscapes this time (not totally baked though) . 1 : Suburbia 2 : Minecraft map 3 : Archipelago 4 : Rivers (this one is insane I think, you can make tiger stripes with black and orange too or zebra stripes with b&w )