This is very fun! 24 levels too, I am having a blast playing through all of them! The art style is nice, the level design is great, and it's very polish with good UIs and stuff too!
Only thing I'd say is that the gun feels a bit floaty and misaligned (probably caused by the visual centre of mass is different that the origin), and makes doing precise actions quite difficult, especially the harder sections in the last 7 levels of the game. The hit box seems to be a bit big too.
Anyway, this is a very solid puzzle game and I like every second of it. Well done!