I liked how the idea was simple. When loading the game, I immediately knew that I needed to shoot the boxes. The inclusion of a menu was a neat touch as well. However, the mouse sensitivity on my end made it difficult for me to aim (I'm using a trackpad). It was also hard to notice the score counter. Putting it at the center of the screen could help with that. It would be cool to see some feedback once the trash is shot (maybe it explodes, makes a funny noise, etc.) Adding a garden or some sort of environmentally friendly structure to defend against the trash could make gameplay more purposeful as well. Overall, I congratulate you on your first game jam entry! I hope that you can continue your game dev journey.