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:

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