These are amazing. Even on the small 16x16 ones you managed to make them look so unique.
I used a few of them in a Game Jam I did last week. Since they worked well as front facing decals. https://bobishere.itch.io/underground-exterminator
I wish I had more use for sprites like this since they are so nice. If I ever find a real project where I need something like this. I'll come back and buy them all up.
Keep up the great work.