Cuphead Game

This free browser version of Cuphead lifts one boss fight straight out of StudioMDHR's run-and-gun classic: Aviary Action, a battle against the cuckoo-clock bird Wally Warbles. There's no map to explore and no stages to clear — you load in, the fight starts immediately, and it's just you, your plane, and three lives to survive three escalating phases as Wally builds into a bigger, faster threat.

The whole thing plays out on a side-scrolling airborne stage. You're piloting a small plane carrying Cuphead, weaving between attack patterns while chipping away at Wally's health bar. Each phase changes his attacks, so a run that goes smoothly early can fall apart fast once he escalates — reading the pattern shift is most of the challenge.

Controls

One player:

• Arrow keys — move
• X — shoot
• C — shrink
• Z — parry
• V — use superpower

Two players can play at once: player one keeps the arrow keys to move, I to shoot, O to shrink, U to parry and P for superpower; player two uses WASD to move, C to shoot, V to shrink, X to parry and B for superpower.

Tips

• Parry with Z whenever Wally throws a pink, glowing attack — a successful parry doesn't just avoid damage, it deals some back.
• Save your superpower for the moments Wally's attacks overlap and the screen gets crowded, rather than using it the instant it charges.
• Pick a lower difficulty first to learn the phase transitions before pushing for a clean, no-damage run on Regular or higher.
• Keep moving in short hops instead of long drifts — Wally's patterns punish committing to one lane for too long.

It's a short, focused fight rather than a full playthrough, which makes it a good fit for a quick session or for anyone curious about Cuphead's boss-battle feel before trying the full game.