Hi, thank you for trying out this admittedly very botched release and providing your thoughts.
I do agree with you that there is definitely a lot of improvements to be done for the clarity of the game and its objective.
I'm not sure if you have read the other comments or notes but there is currently framerate issues with the build that was submitted that affects how enemies behave.
Also, LSHIFT is for locking the direction the character is facing so the character can aim at the enemies whilst being able to move in different directions. Slowing the player down was a way I thought of balancing this mechanic.
I may also include a web version later to quell any worries about running programs locally.