Puzzle Retreat is a real challenge in the later stages. If you've managed to conquer it for the time being, you might like some of these other games:

TwoDots tips
TwoDots tips
Icomania Help
Icomania Help
Lazors Answers
Lazors Answers
4 Pics 1 Word Help
4 Pics 1 Word Help
GTA 5 Help
GTA 5 Help
This + That Answers
This + That Answers
Guess The 00s Answers
Guess The 00s Answers
Icon Pop Help
Icon Pop Help
Pic Combo Help
Pic Combo Help
Flow Free Answers
Flow Free Answers
Monument Valley Videos
Monument Valley Videos
What's The Band Help
What's The Band Help
WordBrain answers
WordBrain answers
4 Pics 1 Song Help
4 Pics 1 Song Help