Are you able to upload this as a zip with separate PNGs? A .unitypackage requires unity.
Sure, let me do that today. Great idea. May I email you a free code for the pack (itch is missing a private message feature)? If you can test how well it can be used outside Unity and post back a comment that would be great!
The PNGs worked great with GameMaker's particle system. Thanks for providing a zip!