Hello, yes, due to time constraints, we weren't able to include a tutorial. All the controls are accessible in the options menu and are customizable; that's why they weren't explicitly named in the game description.
To target the first robot, simply orient the character towards it; the game will automatically aim at it.
To defeat it, it needs to overheat or be frozen. You'll notice this when it changes color. However, be cautious—if there's too much time between attacks, it returns to its normal temperature.