It functional but I Couldn't even figure out how to complete the first level. I managed to combine the droplet with the blank but nothing else happens. Is there some obvious mechanic we are missing here?
Hint: Use all your mouse buttons to check everything (and I mean EVERYTHING) on the screen. Sorry if it's tough, but if it makes you feel better, these puzzles were intended to make people stop, think, and take some time to solve them, so it's okay if you were in a bit of a rush!