Very creative mechanics! I like this entry a lot. The visuals and audio just feel very coherent and overall appealing. A lot of nice effects and juicy. I also like how the stage names gave you hints on the solution of the puzzle.
If there's one nitpick I kinda wish the movement wasn't tied to the mouse cursor. It was a nice break for my hands to not have to use WASD to move in all honesty, but I think it could work better here. The best thing for this is probably a twin stick style controls.
SPOILER: In the final level, somehow it was possible to not trigger the small red boxes on the top corners after you fire, so it was possible to take your time, instead of having to race down the level.