Zabuyaki is an old-school side-scrolling beat 'em up.
It is free, open source and cross platform.

Kisa from Zabuyaki

We're looking for a 2D/pixel artist
to draw stages / backgrounds! (Not paid)
Interested? Contact us!

The game is far from finished, but you can still try it now!
Just install LÖVE (version 0.10.2) then run Zabuyaki.
Player 1 controls: X = Attack, C = Jump
Some game pads are supported, but touch screen is not.

Zabuyaki by SineDie (Stifu and Don Miguel)