Can You Play 2-Player on Super Mario Flash? No — It's Single-Player Only

Super Mario Flash (by Pouetpu / 1UP) is a single-player browser/Flash game. No local co-op, no online multiplayer, no versus mode.

How to Play "Together" Anyway

• Hotseat / Pass-the-Controller: Take turns. Race for fastest time, most coins, fewest deaths, or furthest level.
• Speedrun Race: Both open same level in separate tabs/browsers. Countdown "3-2-1-GO" via voice. First to flagpole wins.
• Level Editor Challenge: Use built-in editor. Each designs a level. Swap codes. Race to clear other's level.
• Commentary/Stream: One plays, other narrates / gives challenges ("No jumping," "Collect all coins").

Actual 2-Player Mario Flash Games (Fan-Made)

• Super Mario Bros. X (SMBX) / SMBX2 / The Princess Cliché: PC fangame engine. Local 2-player (split-screen or shared screen). Huge community levels.
• Mari0 (PC): Mario + Portal gun. 2-player co-op (split-screen).
• New Super Mario Bros. Wii / U (Dolphin/Wii U): Official 4-player co-op.
• Super Mario Maker 2 (Switch): Online co-op / versus. Create/share levels.

Why Super Mario Flash Is Single-Player

• Built in **ActionScript 2/3 (Flash)** — no networking API for multiplayer.
• Level design assumes one player (camera, triggers, enemy spawns).
• Creator (Pouetpu) made it as a portfolio project, not a platform.

For true 2D Mario multiplayer: **New Super Mario Bros. U Deluxe (Switch)** or **SMBX2 (PC, free)**.