I can't remember how many screens there were exactly, as I started playing this back when it was first released (which was quite some time ago), but there was most likely no more than five rooms.
Gameplay-wise, it's more of a grind than something to play for fun. There were some parts that I did enjoy, but overall it felt a bit more as if the maker focused on making it difficult as opposed to making it enjoyable (in my opinion, at least).
The game certainly has cool level design, and the maker didn't result to standard jumps, so the game has that going for it. I'd recommend if you like harder needle.