I actually finished it! Nice to finish a puzzle game for once ;-)
I love how well this meshes with the theme. I like the look of the key caps and love how the duplicate ones already placed on the board get pressed when you use that direction. I like the night theme and the greyscale palette – I think the music goes well with it. Overall, feels very unique.
The puzzles are pretty challenging, and usually you can’t just mash your way through them. You can waggle around and make a little progress, but usually you do some thinking to solve them. Also does a great job slowly revealing the puzzle elements (keys, dupes, teleporters) to ensure you understand them before you have trouble working with them. But it does this tutorialization without getting boring.
Great work.