Main goal in the blastarena.io game is to be the last standing player. you should either kill all of them or wait for them to kill eachother.
In order to navigate across the game arena, you need to use ASDW or arrow keys. In order to place bombs, you have to use the space key. When placing bombs, you have to be careful to make sure you are not being affected by bombs when they explode. You should hide between columns after placing bombs otherwise you are dead.