I feel like this fits the retro theme, in the sense that it reminds me of those games that you would find randomly in the school computer. I really like the difficulty increase across all three levels, and the art just looks fun! I also like that it's like Space Invaders, but with being able to get around the obstacles. This game could benefit from diagonal movement (up right, down left, etc), as it seems you can only go in the four main directions. Besides that, I like it!