This game falls into the idle desktop genre, which means you can continue working on more important tasks while it runs quietly in the background. Although you can ignore it for a few minutes at a time, you’re still encouraged to click a few buttons here and there to collect rewards.
The objective of the game is to let rabbits board the train and then press the “Go” button to start it. Seats in the cart are limited, but this isn’t much of an issue since there are plenty of rabbits waiting to fill them. You can either wait for the rabbits to board on their own, nudge them by clicking on them, or press the whistle, which quickly makes rabbits jump onto the train.
Each passenger pays a number of coins when boarding and rewards you with hearts once the train stops. You can also earn additional hearts by clicking on the rabbit-shaped cloud that slowly forms from the train’s smoke as it travels along the rails. The indicator for when to stop the train is visible by clicking on the cart, which displays all passengers along with a heart next to each one. These hearts fill up while the train is moving. Normally, it takes about one minute to fully fill a heart, but if you let the rabbits ride longer than that, the total number of hearts you receive at the end will decrease.
That’s the entirety of the core mechanic. While it requires attention roughly once per minute, there’s an idle “pomodoro” mode that allows the game to run automatically. You still earn coins and hearts in this mode; all you need to do is set how long the train waits at the station, how long it drives, and how many repetitions it should perform. The minimum waiting and driving time is one minute, which is enough to satisfy all passengers. However, you’re limited to 20 repetitions, meaning you can’t leave the game running unattended for several hours, such as overnight.
Beyond a few standard features typical of idle games, like a music player and a to-do list, the main appeal lies in collecting different rabbit types and upgrading your train. The train can be improved through six different stats, such as cart expansion, which allows more rabbits to board, or service improvement, which increases coin rewards.
Each stat can be upgraded four times, but upgrades are fairly expensive, increase with each purchase, and usually require several trips before you can afford even a single one. The only meaningful increase happens when you fully upgrade something, so the first few won't mean much. One notable issue is the lack of clear stat descriptions; you won’t know exactly what each upgrade does unless you hover over it and observe changes in the overall stats displayed on the left side of the screen. You can also purchase background elements, but these are a waste of money because they don’t add anything.
New rabbit types are obtained through a gacha machine that costs hearts to use. Once unlocked, a new rabbit type has a chance to appear among the passengers. Each type pays a different fare and requires a different amount of travel time, which adds some variety. Fortunately, this doesn’t require micromanagement in pomodoro mode, so sticking with the one-minute settings works just fine.
Since the gacha system is luck-based, you’ll likely receive many duplicates. Thankfully, duplicates are used to upgrade rabbit types. The more duplicates you collect, the further you can upgrade that rabbit, increasing both the coins they pay for tickets and the hearts they generate when the train stops. You can disable certain rabbit types from appearing, but this feature isn’t particularly useful—especially since the common white rabbits cannot be turned off.
Overall, this is a simple and straightforward idle game that demands very little attention. If you’re aiming to unlock all achievements, you’ll need to keep it running for several days.