When I ran it, half the embed was covered up with a notice saying 'Running with IndexedDB access disabled' and the actual game window was very small. Also my cursor kept being dragged downwards, making it very difficult to aim. The enemies would frequently phase underground or just be facing in a direction where I couldn't see their colors.
I expected right clicking to cycle shot colors to work by basically just skipping a shot and going directly to the next one, but that didn't seem to be the case, so I'm not sure how it worked. I also would like the next shot colors preview UI to be located somewhere more central, like maybe beneath the crosshair or in the top middle of the screen, so it would be easier to look at both it and where I'm aiming at the same time.