Guudo is a 3D, action-adventure platformer game where you play as an extra-terrestrial scout. Guudo has crash landed on earth in the middle of a film set and uses their abilities to eat, shrink and grow. Guudo needs to find props around the set to blend in with the humans.
Making a prototype in a game engine is great but sometimes it can be much quicker to go from initial concept to test and iteration on a game idea with pencils, paper, dice and random board game pieces. This is known as paper prototyping.