
Players are able move and jump freely around the stage, with the arrow keys (or A, S, D and W for a second player) being used to move and crouch and the O key (or G for a second player) being used to jump. Players can also attempt to recover when launched off of the stage, but failure to do so will lead to them falling out of bounds, resulting in a KO. Each player's objective is to KO their opponents by knocking them outside the stage's boundaries, and as a character's damage percentage rises, they can be launched progressively farther by an opponent's attacks. As each character is attacked, damage is accumulated and the percent value increases. Unlike most traditional fighting games, each character's health is measured by a damage percentage counter. Super Smash Flash's gameplay is based on that of the official Super Smash Bros. Mario, Sonic, Link, and Mega Man X during a timed, stock Melee match. To commemorate this event, McLeodGaming released a video confirming the inclusion of " SSF mode" on SSF2's special mode which purposely recreates the physics and quirks of SSF. On August 21, 2016, Super Smash Flash celebrated its tenth anniversary launch on Newgrounds. Super Smash Flash is getting rebooted with a new game called Super Smash Flash 2, which is completely ignoring the basis of the first game and starting a new with gameplay mechanisms that are more similar to the ones in the official Super Smash Bros. A downloadable EXE version was made available seven days later on Augon the McLeodGaming website. The original browser version for Super Smash Flash was first launched on Augon entertainment media website Newgrounds to mixed to positive reception.

Besides that, it also includes original fan characters like Blade and Blue. It also features many third-party characters, including Sonic the Hedgehog (who, at the time of the game's creation, was not confirmed to be a character in Super Smash Bros. series, such as Mario, Samus Aran, Link, Kirby, and Pikachu.

The game features several characters from the Super Smash Bros. Melee in the menu format, music and numerous other fields such as game play modes. The game is loosely based on Super Smash Bros.

Super Smash Flash, commonly referred to as Super Smash Flash 1 and abbreviated SSF or SSF1, is an non-profit Flash fan game developed by Gregory Cleod9 McLeod and published by McLeodGaming.
