Flat Heroes is a local multiplayer game for Nintendo Switch with cooperative and competitive modes for 1-4 players. The game is minimalist in nature and features squares as the main characters. Players can move around the scenarios with ease and beat all the challenging scenarios in the cooperative mode. The game also offers four different versus modes that allow players to compete against each other or against the AI. Each mode highlights a different set of skills. The graphics are simple yet eye-catching, with polished animations and transitions.

The game offers the option to play alone with bots or invite friends to play together. The levels in the cooperative mode have been designed to be enjoyed solo as well. The game has been designed to be played using controllers, but a keyboard-mouse control scheme is also available for those who don't have a gamepad. The game also has a color-blind mode that allows players to lock a color scheme that suits their needs. The game is accessible, with easy levels at the start and challenging levels later on, especially when playing alone. But playing with friends can make it easier and more fun.