Thanks for the great feedback! Glad to hear you enjoyed it.
We definitely put a lot of effort into trying to make the gameplay as animated and responsive as possible. Those angel death particles were one of the only placeholder things we ran out of time to update with a pixel art, unfortunately, but I agree with your point, nonetheless.
I definitely wanted to do a bit more with the angels, functionality-wise, and I may still do a couple small updates to the game to add a few of the things I ran out of time for, such as more things that they can do or rewards for killing them or little power-ups. And yeah, I also wanted to add those indications about which direction they're appearing from, but 'tis the way things go in a jam sometimes.
Happy to hear it gave you some inspiration for your own projects! Feel free to ask about any details if you'd like to know more.