The game is good, controls are responsive. I dont know which engine you have used for your game.try creating/modifying the animation state for the player. As the movement animation can be triggered while in air, resulting in being able to walk in air. One more suggestion is telegraphing the side from which the enemy might appear, as the game is barely lit, so its hard to guess from where the enemy is coming.
Overall, the its a good base to start from, and could lead to be a great finished title. Good job.