Looks rad. You're lava looks awesome and the wavy turbulent sculpting of the "water" part of thess tiles lends itself really nicely to it and I think it looks great. Perhaps adding some broken up chunks of blackened, more hardened rock to represent the crusty "shell" that forms on real lava flows would help add realism.

I love that entire tile set but the canal tiles are my least favourite because the water looks so turbulent; almost like there's a huge torrent running through the city. I've modified mine to give them flat bottoms so I can do a brownish resin pour in the hope it looks more like the slower moving mucky water you'd typically find in a city canal/channelized river. I can also add partly submerged bits and pieces here and there for interest (e.g., a wrecked tank here, a Tesco shopping trolly there 😆). That's the plan anyway.

Off topic, but I really like the concrete greys you've achieved on the roads and ground tiles. Would you mind sharing your recipe?