First time playing I had no idea what to do (so a tutorial level for sure), since not a lot of players (me for example) read any text, they just jump straight in. Shooting the shadow was also very difficult at some points, I couldn't properly aim down and it ended up being me spamming bullets on the ground :D Got to level 3 though before I gave up!
Great idea and something to further develop for sure with that game mechanic