Cool game! I found the difficulty to be not too hard, I could complete the game after a couple tries. The challenge for me came from how the enemy bullets are fast and hard to see against the background, and that the player ship moves with a long acceleration time, making it hard to get out of the way in time.
I appreciate that you have a title screen, options menu and pause menu (not that common for jam games). I'm not sold on how the button text is hidden until you hover over it and wait for the animation to play though :P