I liked the flash game style art, specially the chaotic look of Anticthon and the tiny enemies that made me a little nostalgic. I seemed to get a lot of errors on the console that apparently stopped the game from loading the weapons or items, which seemed to be an essential part of the gameplay, so make sure to playtest as often as you can to look for possible bugs.
I suggest adding more info on your game's itch.io page to make sure people know what your game is about so they want to play it more.