This is an online fighting game called Stickman Super Hero. You can play as Stickman and fight bad guys on Earth and in space.
You can choose your heroes, get stronger, play in a competition, and move up the world rankings. Get stars in every fight you do to unlock new heroes like Captain America, Iron Man, Spider-Man, and many more. It's fun to fight, but it will take you a while to understand how it works.
Stickman Superhero has controls that are possibly the same as those in other sandbox games. To move, tap the virtual joystick on the left side of the screen. To attack, fly, dodge, or use your special powers, tap the buttons on the right. You may notice that the layout of these buttons changes a little depending on what you're doing. This was done on purpose, though, so you can enjoy smooth action without any problems.
Have fun and good luck!