Zabuyaki is an old-school side-scrolling beat 'em up project.
The game development is discontinued as it has been replaced by Zabu.

You can still try it:

Player 1 controls: X = Attack, C = Jump
Some game pads are supported.

The source code is on GitHub.

By Zabu Team (Stifu and Don Miguel). Music by Juhani Junkala.