Each character in Geometry Dash: Ultra Mega MOD Playground has its own set of unique abilities that you can unlock by experimenting with them. These abilities range from special jumps to invincibility modes, making each character play differently.

To unlock the full potential of the characters, you need to explore and experiment with them thoroughly. Try out different levels and see how each character performs under various conditions to fully understand and utilize their unique abilities.

The automatic machine in Geometry Dash: Ultra Mega MOD Playground serves to enhance your experimental adventures. It can automatically generate new levels or modify existing ones, providing endless fun and excitement for players.

Yes, the portal gun in Geometry Dash: Ultra Mega MOD Playground allows you to create portals that can transport you between different areas within the same level, adding a layer of strategy and excitement to your gameplay.

While direct customization of the characters' appearance isn't mentioned, you can effectively 'customize' them by discovering and utilizing their unique abilities and playing styles, which makes each character feel distinct and tailored to your play preferences.

Geometry Dash: Ultra Mega MOD Playground provides initial guidance and tutorial levels to help new players familiarize themselves with the basic controls and mechanics of the game, ensuring a smooth start for all newcomers.

Yes, there are specific challenges and achievements designed around utilizing particular characters and tools like the portal gun and automatic machine. Completing these challenges can unlock additional content and rewards in the game.

Different characters in Geometry Dash: Ultra Mega MOD Playground have varying health levels, which affects how much damage they can withstand before losing a life. Experimenting with each character will help you understand their health management and survival strategies.