I liked the AI of the upgradable ships, they helped, but you couldn't fully rely on JUST the ships if you wanted to completely avoid receiving damage, which prompted engagement. Not sure if this was intentional, but it was fairly difficult to click on the trash, maybe having an upgrade to expand the hitbox of the click? I got roped into the game until completion! I would have liked to see more of an interpretation on the theme though, like what's IN the bag of trash being a resource (like the trash in the bags of trash can be ammunition for a projectile for some of the ships, and the projectiles can do different things depending on the type of trash. You can also have ships that can't use this trash resource, so they have to touch the dock in order to pass the trash on to ships that CAN use it, if that makes sense). Great job on engaging gameplay!