Mission 22 killed the game for me. I tried for a hour and the best streak I could get was 4. I have all bars at 100% and the price set to the minimum (100) and still couldn't pass the level.
Also i'd like to see a fast forward button and a pause button. Mission 16 (I think) took me a while because the people move so fast I couldn't click on the ones I wanted to try and find the people I had to.
This is one of the very last missions (22) in the Campaign mode and hence a really tough one to solve. Especially so in conditions where purchasing power of visitors to your region is low, you may not be able to attract rich enough guests. Also really high crime levels and seismic activity may cause troubles solving this level. Also when you have maximized your service level and 5 star status, keep an eye on your hotel room utilization rate to ensure there's always sufficient "buffer" to accommodate all visitors.
Upgraded times are false. A level 5 spray gun says it's suppose to produce every 17 seconds, but actually produces a level slower (20 seconds). Same as a level 5 sniper, it's suppose to be 22 seconds but actually produces at 27 seconds. Those are the only 2 guns i've tested so far.
How do you cancel a build? If I accidentally click a basic tower when I meant to click the lightning tower, i'd like to be able to cancel that build instead of trying to find a spot for it. And as mentioned in other comments, more time, hotkeys, same as the previous 2 titles, blah blah blah. 1/5
You need to add a hidden weight attribute to the castle pieces, that way a person or people can only have so much weight on top of them before they die. It's frustrating to see 1 or 2 people hold up like 20 castle pieces.
There needs to be something that balances the invisibilty ability of the ninjas. 5 seconds feels like ages and they're able to walk through the entire map. I'd suggest either lowering the time, or make them normal speed, or have a spell to reveal them, or have one of the towers able to detect, or even an ability we could by that could reveal them.
One of the best tower defense games otherwise.
A reset skill option would be really nice. You could even have the reset skill have a penalty of loss of exp points. Also not sure if it's a bug but I didn't gain any skill points for leveling up to level 11 and 12. Is the max level 10?
 "Hotel Baron"){kind=icon}
 "Robot Clashes"){kind=icon}
 "Penguins Attack 3"){kind=icon}
 "Wake Up the Box 2"){kind=icon}
 "Crush The Castle 2"){kind=icon}
 "Cursed Treasure: Don't Touch My Gems!"){kind=icon}
 "Take Something Literally"){kind=icon}
This is one of the very last missions (22) in the Campaign mode and hence a really tough one to solve. Especially so in conditions where purchasing power of visitors to your region is low, you may not be able to attract rich enough guests. Also really high crime levels and seismic activity may cause troubles solving this level. Also when you have maximized your service level and 5 star status, keep an eye on your hotel room utilization rate to ensure there's always sufficient "buffer" to accommodate all visitors.