Welcome to the v0.93.1a release of Pixelman. No longer the first to introduce the Sprite Testing Arena I've been working on for the last few months, but that new feature still bears mentioning.
I'm really really hoping to have as many people as possible to check this new feature out. All instructions are in the Readme included.

*Added Hflip and Vflip Tools.

*Note on Gridshift - Shifting past one edge of the grid will wrap around. This was fixed in this release from v93.0c

*Note on Rotation - Rectangular sprites really won't rotate correctly at 90 degrees so instead, they'll rotate a full 180. This was fixed in this release from v.93.0c