FWIW: I also enjoyed the game. I also got confused between strafe and turn, and often did things like bombs by accident.

My additional feedback:

* I got to level 13 or 14, and then got bored. There was no way to save, and it wasn't clear if it went on. Does it repeat forever? Is there an end.

* What would also be helpful is to understand the purpose. This type of game is the type of game I often see developed as a kids' project, where in a camp or similar, a senior developer sets up an API designed to make it easy, generates all the artwork, and then kids code the high-level logic. If it were open-source, perhaps it'd be that? Perhaps it's intended to be commercialized with more development (that'd be tough with a million similar apps)? Perhaps it's intended as publicity for the coding shop? That would be helpful to understand too when looking for feedback or when visiting.