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:

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