Passage: Mini Metro is a puzzle strategy video game, in which players are tasked with building an efficient rail transit network for a rapidly growing city. Each level is a flat depiction of a real city and begins with three train stations. Train stations are represented by different shaped nodes. Players can construct routes to link stations by drawing lines between them; each route has a different colour. Passengers appear at stations, each denoted by a shape that identifies which station they want to travel to. Trains travel along routes taking passengers to their desired stations. Rivers, intersecting train lines and the appearance of more stations and passengers over time causes the transit network to become more complex and difficult to manage. Common-shaped stations can also change their node shape into rarer ones. The game's visual style is minimalist, employing straight lines and bold colours, similar to modern transit maps.In the "Normal" game mode, each station can accommodate a limited capacity of waiting passengers; if the stations become too congested and the threshold is reached, the level ends. Upon failing, players can continue to build their network in the "Endless" game mode where stations do not have a limited capacity. To alleviate the network's growth, players earn upgrades each week of in-game time. At each upgrade, the player receives a new train car and a choice among two other random options such as an extra rail line, an extra train carriage, extra tunnels, or an interchange (which increases a station's capacity and allows trains to instantly load/unload passengers). In addition, the transit simulation can be paused at any point to allow for reconstruction and adjustments to train routes. In "Extreme" mode lines between stations cannot be adjusted once their position is set.In 2018 a "Creative" gamemode was added, which allows players to create, adjust and add stations in the game. This is grid-based. This gamemode has also given the player almost unlimited train cars, train carriages,...

Question: What happens if the station is too congested?
the level ends