You will have to go through hordes of monsters!
After all, Herobrine kidnapped Nubik's brother!
Craft weapons, upgrade them, use them to defeat enemies.
Become a Hero and save your brother!
Control for PC:
Walking - arrows/WASD
Attack - press LMB
Weapon Crafting - Drag the weapons in the inventory to the same weapon to get an upgrade.
And if you decide to fight through the screen of your mobile device, then:
Walking - control takes place through the on-screen joystick
Attack - the sword button on the screen