I now understand why player can easily miss the information about the game control. At first, I only saw the left long press and didn't pay much attention to the [space] to go back into a wizard and do the shoot again. Maybe a clearer instruction will be better, like in-game tutorial maybe?
Like the idea of the game, first play more than 8 mins, but improve on the second and third. Still couldn't beat the developer's time though.