Neat little game! I think the gameplay concept is interesting and can feel fun and snappy, but it has some issues. The biggest issue is the fact that the player sprite oftentimes obscures the enemy sprite. Even though you're able to see the through his sprite, it impacts the gameplay because you can only see through the player sprite when the cursor is over it. Since you're trying to dispose of enemies as fast as possible, it's a pretty big issue. The aim sway is also too heavy. It's an interesting stylistic choice but isn't particularly fun. I think having a mild sway or none at all would be ideal for a quick and snappy game like this. But overall the game is visually charming and has great music. For a game made in a few weeks, pretty good. You've got a great skill set so I look forward to more of your future games!