A classic tribute game to past space arcade games, which are a ton of fun! And also fitting for a mobile device as tapping and shooting while holding down input. My only small improvements that I can offer are instead of a points for health it can be say 3/3 integers rather than a health pool number. The score goal as well is great to have as an arcade high score goal but an ending of some sort would be great too or to allow a scalable spawn of enemies or even a boss! Overall a great experience!