Use the slider by clicking it to look through physgun colours. Space to close physgun colours. E to change Physgun Colour In-Game G to create a cube. (it is recommended the cube is close to you to make it faster when trying to pick it up)
I thought of a 2D Garry's Mod. 25/7/13 The game lets you change your Physgun Colour while playing the game by pressing E. 24/7/13 First initial release