CARGO is one of the four daily puzzles in NOCTURNE ISLAND, a small browser game I'm making on my own.

You get a ship's hold with a few blocked cells and ten crates of different shapes. Crates can't be rotated. The hold can be filled completely, but only with some of the crates, so a big part of it is working out which ones stay on the dock. Your score is how much of the hold you filled, and you lock it in with Finish loading, so a partial load still counts.

Each day's hold is generated with a known full solution, and everyone gets the same one. The other three puzzles are TANDEM (one arrow moves two couriers), BLOOM (water every greenhouse bed exactly) and RANGE (trivia answered with a range).

Free, no account, works on phone and desktop. Two things I'd like to know: does it become clear early enough that you're not meant to use every crate, and does dragging feel okay on a phone?