Hitori - Logic Puzzles

i really like the 8 different difficulty levels (from "greenhorn 5x5" to "grandmaster 20x20") but it's not really clear that this app is one of those game apps where they give you 2 puzzles for each difficulty level but if you want more, you have to pay for game packs. i know part of it is my fault b/c i didn't read the more part but that's still the only thing that says it. there's no screenshots in the app store & doesn't say anything anywhere else. i downloaded this late last night & i thought maybe it was the type that added everyday. this morning i went to check, nothing changed & i noticed the shop icon on the bottom & it hit me.

I have enjoyed this app for almost 2 years now but I do not like the latest change to the background. It is much harder to see.

I LOVE Hitori. And this one is a good one to play. However it keeps lagging and taking forever for it to recognize my moves. I bought the pack but can’t get completely through it. Even after completing a level it resets a few moves back and it makes me redo the last few numbers again.