Kurohyou: Ryu ga Gotoku Shinshou fan made side scrolling beat ‘em up.
(About 2MB in Size. Give it a moment to load.)
Easy | Normal | Nightmare | Death
Controls:
[Z] Jump
[X] Attack
[→ → X] Heat Action punch
[C] Heat action while grappling
[Arrow keys] Players move
[M] Mute On/Off
[Ent] Pause screen
Gain Heat by defeating enemies.
(Source: http://www.tojokai.daynight.jp/)