Interesting and well done submission! I love the art (especially the character and its evolving gun) and music. Great job on the level design, it looks a bit weird and empty at first and it may be a bit long before getting the first upgrade. But everything is smooth after that and feels clever. Great ending animation!
Only real downside for me were the frequent unwanted collisions. Moving the character wasn't feeling great all the time.
Also, got quite a few shots that definitely hit the target but didn't destroy it.
Overall, very fine game! Congrats!