Great game ! I gave 4 stars because of the bonus at the end. You can unlock the bonus when you finish the main story...didn't see anything about you gotta pay to unlock the bonus. I had no glitches or other problems. Loved the no ads part! As for the ppl complaining about hints...it's not a hint game, you are supposed to use your brain to figure things out.If you get a hint every time you are stuck it's no longer playing, it's cheating, where's the fun in that? Congrats to developers!