Claw machines can seem pointless, but they have specific controls and mechanics. I found that controlling the claw is tricky and luck plays a big role in grabbing characters.
Collect characters by aiming and dropping the claw, then hope it grabs successfully in a fast manner.
About controls, the claw moves unpredictably, and dropping relies on timing and positioning. No other controls are mentioned.
Watch the claw carefully and wait for the right moment before dropping, outer edges are often better targets.
Q: What is the objective? A: Grab characters with the claw.
Q: Controls of the game? A: Controls are not explicitly stated.
Q: Are there features like timers or modes? A: Not stated.
Q: What is the main mechanic? A: Aiming and dropping the claw.