My game is about punching monsters in the face
Many thanks to Zephaire for helping me get this idea.
The game is about a fighting tournament where you fight others to prove you are the greatest fighter in the world. Your grandfather, seeing you are going to a dangerous place alone, gives you his knowledge about ki.
The gameplay is really simple. Same way as Punch’Out, you fight one guy each time. Each fight is split into your turns and the enemy turns. You have two attributes to help you fight: life and stamina. Life is what keeps you fighting. Stamina is what keeps you punching.
During your turn, you define your action using a Bejeweled board, similar to Figure 1. You select a group of elements which corresponds to the action. Those actions are: healing, attacking and ki. The selection of the elements is similar to Dungeon Raid (Figure 2).

Figure 1 - Bejeweled

Figure 2 - Dungeon Raid
When you select attacking elements, you attack your enemy, depleting his life and your stamina. If your stamina reaches zero, you lose one turn.
When you select ki elements, you recharge your stamina. If you combine these elements with attacking, you do an special attack. They diminish your stamina much more than normal attacks, but also give much more damage to the enemy.
When you select healing elements, you recharge your life.
At the end of each turn, your stamina is slightly recharged.
During the enemy turn he can give you attacks or special attacks. Mostly, they damage your life. However some attacks also damage stamina.
The winner is the last one standing.
Each time you win, you get closer to be the greatest fighter ever. The enemies get toughter too.
Well, that’s my game idea, hope it’s good.