I liked the Graphics, however you could have added some particles around the whole scene like Dust. It really helps the game to not look that static. You should also decrease the Collider of the Player/Enemies because i sometimes died where i shouldnt have died from my experience. As the others said checkpoints would be nice i quited in Level 6 due to the Death by the Colliders. However you also made a lot of right like the Sounds that builded a nice Atmosphere. Great Submission.