i have no idea how
see make simple but simple idea try bird that when it stop it wings it fall and if it run in cloud it fall the water make it wings not left or if you sell food on the street then you need to get to the other side of it but you need to hold button on the keyboard far like A V M U I to walk don't try to make idea that other people like make fools idea and be marge different so it become something new good luck and hope it help
Do the basics and add changes, such as adding visual effects, shaking the camera or changing the image such as zooming in and out adjusting or adjusting the SHADER however the most important thing is to choose something even if it is simple but tp increase your skills we hope that everyone will win in the competition