This was really well done! I have a couple suggestions that may help you with your future projects. If you're using the mouse to shoot, the player expects to be able to fire where the mouse points. If you want to use 4 direction shooting like what you have here, I would recommend tying it to a button such as the space bar. Another thing is I'd recommend making the UI bigger, because looking down to see what my health was at distracted me from the main gameplay. It's helpful to the player if they can tell at a glance what their health is rather than having to pause and look. Wonderful job overall! I look forward to seeing your next project