Cool game! I think the primary task of pushing boxes into the water while being attacked was pretty well balanced. I also think you had a pretty good spread of upgrades to choose from, and I felt like I was making meaningful decisions (chonker + shotgun build, let's go).
The post processing and light vfx when shots were fired or when I got damaged were nice touches that helped sell the impact of the important moments.
However... on 3 different playthroughs I couldn't continue onto the next island because pressing space wouldn't let me get in the boat. So I gotta leave my high score at 12. Sort of a critical bug I would love to see fixed because the box pushing/managing enemies gameplay was cool. A sort of emergent strategy I used for the later islands was to get the enemies to push the box for me by putting the box between them and myself, that was a cool moment :)