if you want to avoid the elevator issue, just stagger your elevators: build one shaft from floors 1-10. then another from floors 10-20. then another from floor 20-30. later, when you get more money and expand far enough, build another elevator shaft on the other side of the hotel, and start staggering that one by 10 floors. somewhere in the middle, do the same thing for staff elevators (but they dont need to connect to each other) hope this helps
here is the perfect trick to beat the igloo collection challenge:
1) you will need the bullet dodger and slow motion gadget, teleport, and dash abilities, and as much focus as possible. you should probably also get the invincible combo (shield + 2 perks that improve positives and reduce negative effects) so that you can survive long enough
2) kill all melee or flying units, but dont kill any walking gunmen. you should be able to accumulate 3 land gunmen.
3) go to one side of the map. make sure the 3 bullets coming at you from the 3 gunmen are hitting you at the same time. then, activate your slow motion. wait for the bullets to be within dashing range, and dash through all 3 of them. immediately teleport to the other side of the map to allow your dash to reload. wait for the 3 gunmen to get close enough to shoot you. repeat (about 4 times): you will get the medal for it and you'll know you'll have completed the challenge.
easy way to beat the final boss: choose the orc, protect your allies until you get to the boss, then get underneath him and press sword attack until he dies. only the orc deals enough damage that you can beat the final boss
 "Theme Hotel"){kind=icon}
 "GemCraft Labyrinth"){kind=icon}
 "The Final Death Wish"){kind=icon}
 "Mytheria"){kind=icon}
 "Feudalism II"){kind=icon}
 "Warlords: Heroes"){kind=icon}
 "5 Differences"){kind=icon}