The game has a lot of potential to be a great fun game, i really like the art style and the music but there are some major flaws with the game sadly.
What iv noticed is that the blue beams just randomly appear and give you 0 time to make your next move to avoid getting hit, what i would really suggest you do is that you make it that the beams have an animation with them slowly shooting down to the ground so people have time to react and move so they don't get hit. And you can make the beams progressively shoot down faster to the ground when you get to the harder levels which would make a really fun challenge for people.
Also just a little thing, it would be awesome if you can also have the option of A+D for moving for people that don't like using the arrow keys.
This game has really great potential and i really hope you improve the game because i got a feeling this will be a very addictive game if you patch it up
Wish you the best of luck with the game and hope to see an improved version of it soon :)