Magicks.io is a multiplayer free for all deathmatch with magic wands, spells and curses. Instead of guns that everybody's used to when it comes to competitive io games, here the player need to use sorcery to defeat their opponents. There are different schools of magic which may work more or less effectively against one another, so you always have to adjust depending on what your enemies are using.
As for UI elements, you have your health and mana bars. To control the character use WSAD keys and click the left mouse button to attack. Now play some Magicks.io and have fun!