Mr. Horsey's Office

Mr. Horsey's Office is the room seen the most in the series. It's where Mr. Horsey often does his work, get pranked, and get weapons from his secret door.

Trivia

 * His office originally only had four signs (all of them being landscape white sheets of paper with black text) and the plant (although its sign was missing). On his desk was simply the phone and monitor and that was it.
 * When it was changed for the second time the posters already made him look more sinister than he already was. One hint being that the "No Fun" sign originally said "suspended" instead of "fired. Literally." Also, the (unseen) "Shut Up" sign simply said he'd get [the perpetrator] rather than explicitly state that they'd be thrown out of a window.
 * Funnily enough, he'd actually throw someone out a window and set someone on fire in the third and sixth episodes respectively.
 * The 4:3 monitor was changed to a 16:9 one in Bomb (when Mr. Horsey upgrades all his computers from Windows XP to Windows 7).
 * While most of the objects have been on his desk in the series (sans The RJL Show Trailer), the mousepad wasn't present until Showing and Hiding Desktop.
 * On the other hand, all objects in the room (especially the desk items) are subject to changing their design each episode. Here's the design evolution of the desk objects:
 * In Bomb (PREVIEW), the mouse and phone system got thinner, and along with that, the mouse turned white. The keyboard and picture frame didn't change, although the lighting on the keyboard did.
 * In Bomb itself, the keyboard was lighter in color but still the same graphic. The picture frame was redone though.
 * In Dirty Cursor and its trailer, due to a hard drive failure happening between that episode and the one before it, most of the graphics were retraced, although the monitor was redone completely, along with the keyboard (despite having the graphic for it still although it was outdated anyway). Also, everything lost their shading.
 * In Fake Format, all the items on the desk finally got better perspective updates, well except the picture frame. The mouse was also redrawn rather than edited to look better perspectively unlike the other objects.
 * This would also be the last time almost any of those items would change their design until Mime Mouse, with only three exceptions.
 * In Showing and Hiding Desktop, the table got a darker color to accommodate for a new background while the picture frame become more straight. The reason why the picture frame changed was because it was never fully finished when it was drawn (and it still isn't although to a lesser degree now) and as such was changed up a bit that way the screen would be able to move more to the left when needed. Plus, that's when the mousepad entered the picture, so yeah.
 * In PowerSave Prank, the phone system gets a cord. That's literally it.
 * In Mime Mouse, the mouse changed to include a scroll wheel (a concept that was introduced by InkApuddle), and it no longer connects directly to the monitor (neither does the keyboard). On the other hand, the monitor now has a plug connected to it which seems to be for connecting it to the actual computer below the desk. Plus, the part of the phone system that holds the phone is now darkened whenever the phone is above it, the plant (which is now mounted onto the wall in-between the second and third posters), chair, and keyboard have been redone by a new artist for the show (InkApuddle), and the mousepad and even the chair seem to be perspectively better.
 * This would also be the first time the chair changed since Dirty Cursor.
 * The signs received rounded corners to better match the show's 2020 style in Click Me, the final Season 1 episode.
 * Technically, the only surviving foreground graphic from Mouse Mover (the first episode of the show) would be the desk itself, and that's only evident if you have the files for both that episode and the recent ones.
 * To be more specific, the outside edges of it not normally seen by anyone else are basically the same as in that episode, but it's fill was expanded to make it thinner, and it changed color over time too.