The visuals of this game were nice, polished, and consistent, and there was just enough quirkiness to make it interesting! I though the UFOs in the second level were a nice touch. However, there was quite a few issues that made this game harder to enjoy. I had to figure everything out by trial and error since there aren't any controls in the game or the game's description. It was impossible for me to aim since I couldn't see my cursor, I just had to guess as to where my bullet was going to go. There's no respawn cooldown where enemies don't affect you, and I would very frequently die, respawn right into an enemy and die again, and have that same enemy kill me a third time because I hit the same enemy which hadn't moved. When I finally did die, I had to quit to the menu to restart. Because of all these issues, I was not able to make it past the second level.
With all that said, this is something to be proud of if this is your first game! When I finally figured out what I was doing I thought the gameplay was fun, almost arcade-like. With a little bit of tweaking, this could be something really fun and engaging. I hope you continue to develop this!