Here we go! My 1 week project is done!
With the villager as the referee!
Play with you mates on this awesome game!

How to play
1. Grab your arrow and enchanted bow to play on
2. Press start
3. Gate will be open RAPIDLY so catch it up!
4. Shoot at boat to select your opponent color to eliminate them
5. Shoot at yourself's color.
6. Swap turns with others
7. Game ends when boat is all sank

Rules
1. Do not spam to buttons!
2. Timer will start ticking when the gate is opened
3. If timer ends, you cannot shoot arrow to boat anymore
4. Don't play with fire! It will cause wool/wood to burn
5. Don't use command /killall on this game
6. Only play in peaceful!
7. Be peaceful to villagers

Errors - There's a few errors in this game, includes
1. Light error - You should be play in night time. If not, the game won't start
2. Start error - Sometimes,the minecart will be lost/stuck. Tried to fix them up
3. Lack error - Usually, when the piston tried to push the color back and forward,
some old computer will be lack. As well as start and end piston
4. Redstone error - Sometimes, the redstone torch won't update cause from
the speed of the redstone pulse. I'll tried to fix next updates.
5. Mob error - Sometimes, our testificates don't go back to their home. But waiting is
the solution.

Recommended!
1. Play with your friends
2. Have mods that can change time in game!
3. Singleplayer Mod, If you play by yourself

Updates - will be update ASAP!
1. Random color picker
2. Scoreboard
3. Few redstone fix

Additional Notes

I will upload more screenshots tomorrow!
If you found some bad redstone, report to me to fix them up!