a """""cool""""""" idea! I think at a base idea this is good, but I think there isn't enough of a level to actually make stepping away from the lava a risky choice, you can just stay there all game without any real repercussions. At a certain point too many enemies spawn at once and it's just impossible to get rid of them so you kinda just have to die. I think adding some verticality to the level would help fix both these issues - good idea though!