Haha!
I see we indeed did have similar ideas.
You did, what I opted out of in the end, because I found it too difficult. Similar to Mullet Madjack the time in your game is a lot tighter and enemies don't restore nearly as much time as they do in my game.
I personally deemed it to punishing in my game and made it significantly easier.
But here it works. I feel like it is still a bit too hard. Enemies could be spaced closer together. I don't like it when you run out of time, because you couldn't find enemies in time. It feels better when they kill me.
But overall a really good attempt at this genre!