Yeah, there’s definitely significant performance issues on the web build (the downloadable build should be better, but that’s no excuse). I should be able to add enemies even when you don’t move as I’m already incrementing the spawn position on the screen, and there’s a lot of little balancing tweaks in terms of the intervals at which enemies appear/advance/attack. The intent for a goal is to find the level exit, which will likely also come with a random starting position, and basic variations of the level layout (flip vertical, flip horizontal and both).
Thanks for checking it out, and taking the time to comment!