Those fire cursors are the very best version of burning fire cursors that I have ever seen on this site. I like the 3D bubble appearance that you used to add a cool finish to those cursors.
The hotspot for the Busy cursor is wrong. Please reposition the hotspot for the Busy cursor in the middle of the cursor.
Since I like this fire cursor set much, please consider on making a green acid version of that. A cold ice blue is also another version of this set that I recommend as well.