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:

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