The only real complaint I have is that after you finish a stage, if you click 'Retry' you don't get the points you earned, but if you click 'Continue' you'll get the points then you can just play the same stage again.
It would be nice if the descriptions were available for all of the upgrades instead of just the ones you can afford. It makes planning ahead a bit difficult.
Can't complete level 31. After you kill the last guy, the "return to map" button appears but the victory screen never comes up, so you never actually beat it.
Sweeping doesn't seem to work. When I use the broom on a dirty mark on the floor, the dirty mark goes away, but it still says 2 at the bottom of the screen and I can still make him sweep. Also the level for "floors" doesn't ever go down.
 "Arcachain")
 "Hidden Tableaux")
 "CaribbeanAdmiral")
 "Giants and Dwarves TD")
 "Freedom Tower - The Invasion")
 "Sad Asylum")
 "ICanFly")
 "Bobeedia")
 "Submarine Showdown")
 "Scene of the Crime: Dream of Murder")
 "Mars War TD")
 "Escape the Zoo")
 "Ultimate Tank War")
 "Ultra Custdodian")
 "Dragon Realm")
 "Dead Valley Drive")
 "Down to Hell 2")
 "Coco Blast")
Did you mean the tooltips in the upgrade screen? Sure, I'll make it visible.