Just checked out your game.
The Windows version got stuck for me before it would show the credits (just played the music and displayed the background). The web build worked just fine, and I played it (apparently it's up to date).
It's a nice little time killer but gets a bit repetitive over time.
Haven't played the previous version but I think the movement needs a bit more work. I didn't like the pause after moving one step, it's a bit frustrating. Perhaps you could check if a key was pressed while the animation is playing and set a flag so that the character moves right after the current animation cycle finishes. If it's meant to be this way, I think you could animate it a bit more so it feels like something going on rather than just a pause. Just a suggestion though.
The spawning system seems to make sense, it allowed me to maneuver and felt fair. I liked the music too, nice and calm.