This is similiar to most of my games. It is a group activity. Students work together to answer the questions on the question sheet or on questions the ALT or Japanese teacher give them as they complete questions. The groups work at their own speed.
You will need: TV or projector, computer or tablet (I use the tablet so the students can select the heroes and record their own points thus freeing the teachers to focus on answer checking and helping groups), A question sheet for each group and an answer sheet for each student.
Do the demo page before separating students into groups. The demo page has two example questions. You click on the 1 or 2 button to see them. Click on the question to see the answer and the answer to disappear. Then click on a hero (not anpanman). That hero will gets defeat and explain the team doesn't get points. Then do the second example. This time afterwards click on anpanman. He defeats baikinman and that team gets a point. Click on the arrow to go to the next screen. Regardless the student returns to their group and they work on another question. I often have the students bring their question sheet so I can check each question as they finish it.
At the end of the time limit (20 to 25 minutes usually) we check the points and cheer on the winners. If you click on Baikinman you go to the end screen. If that is done by mistake you can click on one of the numbers to go to an earlier point in the game to continue.
I usually pair this type of activity with a quiz game to introduce or review the grammar or a pair pattern practice game to practice the grammar.
In the 3d year version I'm using parts of quizzes I've posted elsewhere on this site because I haven't had a chance to use them yet this year.