A bit cumbersome

I liked it, having no experience with this type of puzzle, but there's not a whole lot to it. It would be nice to have some sort of feedback for when you make a mistake. I marked most of my puzzle only to realize I had made a mistake, but there was no way to salvage the game other than to restart. Maybe a hint button that shows the number of mistakes in a given row or column? Not sure if that would be game breaking as you could probably pinpoint which square was wrong (defeating the challenge of the puzzle). I can see myself addicted to this type of puzzle with a little more polish.

raindrop splashing on a mushroom?

You already know to add more puzzles, regrettably I don't have the patience or the time to finish the puzzle (first picto game I've ever played) but it is very entertaining for those puzzle heads.

best thing I can suggest is making a main menu, make easy, med, hard unlockables, and throw some more sexy in.

Music would be nice.

Good, but unrewarding

The picross puzzle itself is good, but I thought you'd unlock something after solving it. When I finally completed it and clicked "Check Solution", all I got were an "congratulations" message. Maybe you could improve on that.
It got the essential parts of a picross game, but I think you can still improve that. Keep the good work!

Nobody reads the author's comments

As a hint, nobody reads the author's comments. They want the instructions tied into the game. I've played puzzles like this before, that's the only reason I knew how to play. I would suggest re-submitting this with instructions tied in so everyone knows how to play.

What?

I have no idea what to do. There's no instructions.