The basic controls in Survivor.io include using the joystick to move your character around. Tap on the screen to attack enemies, and utilize the buttons to activate special skills or use items.

To upgrade your character or skills, collect experience points by defeating enemies. Once you have enough points, you can access the upgrade menu and choose which skill to enhance or which new skill to acquire.

In Survivor.io, you can find various weapons ranging from melee weapons like swords and axes to ranged weapons such as guns and bows. Each weapon has unique stats and abilities that can affect gameplay.

The loot system in Survivor.io is designed to reward players for defeating enemies and exploring the map. After defeating enemies, they drop loot boxes containing weapons, items, or upgrades. The quantity and quality of loot can vary.

To effectively level up in Survivor.io, focus on the following steps: 1. Engage with as many enemies as possible to accumulate experience points. 2. Complete the objectives in each game mode for additional rewards. 3. Use your upgrades wisely to optimize your character's performance. 4. Regularly explore different areas for hidden loot that can boost your experience gain.