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:

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