Aside from that, I noticed that there is one part of a sprite that has been clipped (both original and transparent versions). Just thought I'd let you know. It's in the upper right hand corner. The top part of the sprite is missing.
Thankyou, Fixed and I'm adding more sprites to the set and will be a V2 in the next few days :) I plan to do a clean up of the designs and expand on a few ideas. Appreciate the feedback.