The pixel art is really cute, and I love the purple color scheme!
I know it was already pointed out but the UI still has a bug wherein it does not display entirely, but it can be fixed by playing the game on fullscreen.
Also the melee attack seems to be inapplicable for close combat as the enemies can inflict heavy damage at an alarming rate, therefore the player is forced to use the ranged attack at all times. It would be cool too if you can hold the button to cast multiple bullets at a time.
So far this is a cool concept and good job! I'm looking forward for bug fixes/patches and other features as well!