You've created a new fantastic graphic style: 3/3
good working gameplay + many different enemys: 3/3
1 point for story, 2 point for motivating the player with upgrades (very important for simple games like vertical shooters), 1 extra point because you didn't put any ads in it :3
>>>10/10 you deserve it ^^
PS: I love the ability to travel around, explore and buy stuff in an open world. That made the game interesting for me and makes it unique. If you make a second part please keep that :)