This is a really cool simple fast-paced shooter and fits Game Jam theme well. Though you mixed up the buttons: usually Z is for jumping and X is for shooting. Visuals are nice, but music feels a bit repetitive. The game is short and that's fine, it still was fun to play :)
You can watch my playthrough at https://www.twitch.tv/videos/328062113?t=03h53m22s
Also be sure to rate my game too https://itch.io/jam/blackthornprod-game-jam-1/rate/319192