I think this was a phenomenal example of leveraging basic art and music. The simplicity of it compelled me to play because it was incredibly obvious what I was meant to do and I could just focus on doing that one thing which made upgrades factor into how I could do that one thing better. Loved the increased pace of the music at each level as it really heightened the sense of tension. When I saw the first yellow guy I was like, oh crap this just kicked up a notch. I could picture something fleshed out with content that revolves around this gameplay loop. Very good work.