Super Captain Falcon 64 is a primarily texture-based ROM hack of Super Mario 64. It is easy in difficulty, and as its title states, stars Captain Falcon from the F-Zero series.
This hack differs from other texture hacks in that some custom code has been written to reflect Falcon's moveset from the Super Smash Bros. series. This includes the famous Falcon Punch, triggered by pressing the L button. For this attack, Captain Falcon will lunge forward a short distance with his fist outstretched, destroying objects or enemies. This move is notable in that it can break several objects in the game, such as the sliding Star Doors or metal fences; it can even destroy some bosses.
Captain Falcon can also perform a Falcon Kick via pressing Z and B simultaneously. This puts Captain Falcon at 120 speed immediately, allowing him to breeze through courses and perform unexpected maneuvers not possible in the original game. Finally, the jump kick has been replaced with Falcon's forward aerial "Knee", although this is mostly an aesthetic difference.
Other aesthetic differences include Mario's voice files being replace with Falcon's and the HUD has been overhauled: a different font is used, the health bar now uses a falcon-shaped emblem, and Mario's icon has been replaced with Captain Falcon's (it is also replaced it in the File Select Screen, albeit using a different icon). A new running animation was made, the File Select screen has different music, the ending sequence has been altered, and the credits music and text have been replaced. The ending picture is also different, and some Easter Eggs can be found as well, one in particular involving performing the Falcon Punch on a Toad.