I was just testing to see how random the tiles are, but accidentally reached 42 days xD 

Typical normal mode run (final outcome). 

 

Third and fourth tile sets, both appear in mid to late game (screenshot taken in endless mode). 

 

 

First (starting) and second tile sets, both appear in early game. 

Time to call it a day. Well optimized; didn't expect the game to run this smooth with over 2000 tiles placed on mid-range PC. 

Day 115 in Season 3 

day 93 on 1st season.