Nice little slide puzzle, although I was never the best at these things. Everything works as you'd expect, and the music is nice to listen to. I like the first two puzzles the best. The hidden puzzles are a very clever little addition. In the grid-based puzzles there is a minor issue where the tiles are split in a way that leaves the outline half-pixel thickness compared to the rest of the tile's resolution, although all other puzzles perfectly follow the resolution.
Viewing post in 4 x 4 Slide jam comments
It shouldn’t be a half pixel as all the art and the game board itself is just 64x64 and all movement is one pixel at a time. But on the edges the black line is just one pixel rather than the two pixels it is when two pieces are next to each other. You can actually shrink the board down to 64x64 by using the “-“ button if you like.