Marching into Steam Next Fest: June 2025 is the demo for construction simulator Kingdom Flipper. Developed and published independently by solo developer Brass Persimmon, Kingdom Flipper is a medieval take on the construction/cleaning simulator genre popularized by titles like House Flipper and PowerWash Simulator.

Simply put, it places you in the shoes of a medieval peasant tasked with cleaning and renovating abandoned castles around the kingdom. The full game promises a list of features including a fully customizable home base, smaller side jobs to earn cash, and an endlessly replayable sandbox mode.

For the Next Fest demo, we’re given a single two-level castle to clean, rebuild, and decorate as we see fit. So, can we make a fortress befitting Arthur, King of the Britons? Or is calculating the air-speed velocity of an unladen swallow a better use of time? Let’s find out.

Camelot, this Castle isn’t

The first issue Kingdom Flipper thrust upon me was in the main menu, where I tabbed out of the game to make a note, and upon tabbing back in was unable to select any menu options, instead gaining direct control of the scenery behind the menu itself. A minor gripe, but it was quite literally the first thing that happened, so it stuck with me. After a quick restart, I was able to jump into the game and start my cleaning and rebuilding duties.

The game first tasks you with cleaning three walls next to you. A simple introduction to the basics. However, I could get as far as cleaning one wall before the broom stopped appearing. One more restart later, and things kicked off. I cleaned the walls, swept up the debris, encountered a few more, less game-breaking bugs, and quickly finished the objectives given by the game. Then my investment really started.

It’s difficult to describe the enjoyment I got out of the demo for Kingdom Flipper. Yes, multiple bugs and graphical errors got in the way of the gameplay. Regardless, when it works, it meets any expectations I had for it and then some.

Only a Flesh Wound

On the surface, Kingdom Flipper is cracked and marred with bugs, texture oddities, and glitches. Stick it out, however, and it has the potential to be the next best thing of the genre.

There is a very solid and intuitive player experience under the surface here. The UI can be messy in the current state, but once you figure it out, the pieces start fitting together and can offer a ton of fun. I ended up spending over an hour just placing random little items around my castle, making it feel lived in. At one point, I completely forgot to take screenshots and notes for this review, so fully immersed in the process was I.

From changing the look of the walls, to what type of bricks made up the floor. Picking out the perfect bed and decorations and setting each individual place at the dining table. Kingdom Flipper initially presents as an unpolished, buggy mess. But keep at it and you’ll find the grail of quality hiding within.

Keep this one in your sights and try out the demo, it’s going to go far. Maybe not as far as a European swallow carrying a coconut, but still.

Kingdom Flipper is developed and published by Brass Persimmon. The full game does not yet have a release date, and the demo is available on Steam as part of the June 2025 Next Fest.