In this game, the protagnist is unmovable like a tower and only able to attack left or right. This concept is very challenging for game designing because of the limitation, but still has lots of protential direction. This is what I can imagine: If the enemy doesn't harm the protagnist. With the existing upgrade system, the game probably can work like cookie clicker, a mindless casual game that brings player a joy of progress. Or, it can tune up the speed, add lots of enemy varients that only vulnerable to specific attack, then it will be an exciting shooting game. But for the current version, i lose interest after several rounds. Maybe it's better in higher level. The screenshot seems promising with massive amount of enemies. But i just don't want to play anymore.
The girl design is kinda cute.