I was thinking how about making a Ruroken game? In the Anime Kenshin uses his sword moves depending on the situation. How about we create a game where you press a certain button to counter an enemy's attack whenever the enemy does something? There will be a regular move, a counter-attack, and a finisher. If you press a certain button at the right time, let's say within a second, you can counter your opponents move and do twice the damage! Sounds like a fun game to me. I already did the coding and it seems its easy to make.