This is a good idea, but the lava appears every second, for a total of 60 seconds. I wonder how your idea would fit within the 1 minute premise. Perhaps the lava could further spread out around the player or something. Not sure.
No problem, maybe just suggestion for next game. It's just that since it's random so I basically just wait in silence until the lava appears then move on to other tiles. Maybe that's how it supposed to be played?