Karma Is A Bitch

The world is so small that if you attack and fail to hit the enemy, the attack will go around the world and may hit you

Space - Jump

Left Mouse Click - Throw Axe

R - Restart game
PS: The browser is interpreting the keyboard inputs instead of the game. To fix this use fullscreen, click with the mouse in the retry circle and then click with the mouse in the game area. After that the game will work well