It'd be really nice if there was some way of signaling whether I can afford the amount I have chosen (10 or 100) instead of just whether I can afford any at all.
Considering how much it sucks to get two stars because you lost 3 lives in early rounds and then playing a totally awesome game, you should consider an upgrade that gives you a new life for every x number of rounds played with no lives lost.
-Ehm, sir? Sir? Mister President?
-Yes, citizen of Madaskar, what do you want?
-We've found a disease.
-What kind of disease?
-Well... It's not dangerous, has no symptoms and really does no harm whatsoever.
-... Well, HOLY. SWEET. HELL! Why didn't anyone tell me?
-That's because it's not visible, Sir. We had to use our black magic skillz.
 "AdVenture Capitalist"){kind=icon}
 "Chuck the Sheep"){kind=icon}
 "Kingdom Rush"){kind=icon}
 "Pandemic 2"){kind=icon}