Store data
- Store status
- Coming soon
- Scheduled release
- 26 October 2026
- Positive reviews
- —
- Total reviews
- 0
- Release date
- 26 October 2026
24-hour and 7-day views use hourly peaks from ten-minute samples. Longer views use retained daily peaks. Up to 24 recent event markers are shown per layer.
Recent views use Steam's daily review activity. Longer views use weekly totals, retained by SteamWatch.
Flip switches and observe results to answer which switch is controlling an apparatus as you work your way through the nine challenges of the 3-Switch Problem Puzzle Park. Talk to other kids and play outdoor activities along the way.
Estimated completion time of 1 hour, give or take.
The park includes three buildings, and each building hosts three of the nine challenges.
You start at the park gate (bottom of map) and work your way up through the buildings as you attempt to complete all nine challenges in a row. If you make a mistake, you return back to the first challenge (either by walking if you fail any of challenges 1-3, or by taking the train if you fail any of challenges 4-9).
Each of the nine challenges has a lobby with an apparatus in an adjoining room.
The lobby has three switches.
One of the switches controls the apparatus in the adjoining room.
The others do nothing.
You must determine the active switch.
But you can only go in the adjoining apparatus room once.
To win the game, you must successfully determine the active switch for all nine challenges in a row.
Although you could try to guess correctly all nine challenges in a row to win the game, there is a better way that does not involve any lucky guessing. Can you figure it out?
As a demonstration of the way the switches work, the outdoor fountain is also controlled by one switch of a three-switch panel. The difference with the outdoor demonstration is that you can actually see the fountain as you play with the switches.
Just like the real challenges, the fountain demo will randomize the active switch each time you return, so it's not always the same switch.
This game was designed and created as a way to help my kids solve the One Light and Three Switches riddle. Rather than simply telling them the answer to the riddle, I made this game.
The original riddle goes like this:
---
There is a light bulb inside a closet and behind a closed door. You cannot see if the light is on or off, but you know the light is off to start. Outside the closet, there are three light switches. You know one of the switches controls the light and you are allowed to flip the switches, but once you open the door to check the light, you can no longer move the switches.
How do you figure out with certainty which switch controls the light?
---
Although there are no light bulbs in closets controlled by switches in this game, my theory is that if a person can complete all nine challenges in a row, they should be pretty close to solving the original riddle too.
In any case, hope you enjoy this little game!
A few minor updates:Fixed bug that building npcs could get stuck in prior room if players run to next room firstAdded floating balls and adjusted water characteristics in Duck Pool (challenge 2)
Read full update on Steam ↗Hi folks, the v1.13 update to the demo released today adds a bunch more content. Rather than just the first rest area and first challenge, the demo now includes challenges 1-3 along with the second rest area and the race car minigame and claw machine minigame. So about 1/3 of the content of the full game.Summary of changes:Added challenge 2 to demoAdded challenge 3 to demoAdded rest area 2 to demoAdded race car game to demoAdded claw machine game to demoAdded coins to demoFixed some dialogue and also made building NPC suggest playing around with switches to see results if wrong answer givenWinning race game awards coinWinning shoot game awards coin
Read full update on Steam ↗Updates in this patch:Fixed a couple strings in Chinese translationsReworked safe tiles in tile jumping game so player can land on edge between tiles of same color (if that color is the next color)Faded tile game victory music when warping to other mini gamesAdded lights to shooting game and racing game for night usageAdded an indicator for the player's car at the start of the race gameFixed bug that challenge 4 bug bassinet was swinging according to frame rate instead of delta timeUpdated music for challenge 8 to be quieter, especially at beginning of song to match levels of other songs
Read full update on Steam ↗Some minor updates:Some grammar and typos in dialogue fixedAdded signs for playing the already-seen minigames from other areasAdded claw machine to the first rest area in case any coins left at end of dayMoved tile jumping victory coin so it's still obtainable if tile jumping game played at end of dayAdded reticle to the shoot mini game
Read full update on Steam ↗A few updates in v1.9:Made test room door close when player enters lobby to prevent cheating.Fixed bug that game state was not being updated to record the number of races won by player.Added a failure sound effect in tile game when landing on wrong color.Have shut off hidden colliders for npcs going home to prevent them getting stuck against benches.Disable the minigames when it's time to go home when train ride skipped.Adjusted size and positioning of you win text in race game so better visible on smaller displays.
Read full update on Steam ↗A few minor updates in version 1.8:Fixed bug allowing talking to npcs that had just become invisible.Updated credits content.Made sure building 1 npc explains that no guessing required.Fixed bug that the race car crash noises were really quiet when player actually in game.Minor updates to some other npc dialogue.
Read full update on Steam ↗A few minor updates including:dialogue updates for Judy, Aaron, Eric, and momrace car game now detects player win properly even when very close finishclaw machine music bug fixedballoon colors added and more balloon objects in claw machines
Read full update on Steam ↗Steam currently lists 26 Oct 2026 as the release date.
A few minor updates:Fixed bug that building npcs could get stuck in prior room if players run to next room firstAdded floating balls and adjusted water characteristics in Duck Pool (challenge 2)
Hi folks, the v1.13 update to the demo released today adds a bunch more content. Rather than just the first rest area and first challenge, the demo now includes challenges 1-3 along with the second rest area and the r…
Updates in this patch:Fixed a couple strings in Chinese translationsReworked safe tiles in tile jumping game so player can land on edge between tiles of same color (if that color is the next color)Faded tile game vict…
Some minor updates:Some grammar and typos in dialogue fixedAdded signs for playing the already-seen minigames from other areasAdded claw machine to the first rest area in case any coins left at end of dayMoved tile ju…
A few updates in v1.9:Made test room door close when player enters lobby to prevent cheating.Fixed bug that game state was not being updated to record the number of races won by player.Added a failure sound effect in…