Additional controls are located in the bottom right corner of the screen. Creators can enable or disable these controls, so this means not all games would have them.
Jump & Double Jump: the biggest round button with the arrow up ⬆️
Dash: located above the Jump button with an arrow to the right ➡️
Shoot: located to the left of the Jump button and looks like a splash of paint
Flashlight: located to the left of the Jump button and looks like a flashlight 🔦