Such sites cost much in terms of development, also hosting this game cost will be very high, because such games need to be running on server, this game will eating the server source.
I love good tower defense games, i download from here the apk games for offline gaming http://play.mob.org/tag/zaschita_bashen/ 
Kindom rush is good, i think there are 3 versions so far (Kingdom rush, kingdom rush frontiers and kingdom rush origins ), to bad after a level later the game becomes very hard and can't win even in easy mode.
The developper of kingdom games (https://www.ironhidegames.com/Games ) has created other games such as kingdom wars, fantasy tower defense, however his style is easy to see it and recognize a game created by him/them ,he has even personal websites for these games. The devellopers earns money from selling the games on google play. ( example : https://play.google.com/store/apps/details?id=com.ironhidegames.android.kingdomrushorigins&hl=en )
and how do you suppose to earn as admin ?
introduce 3 ads to watch between waves ? and by watching ads to earn satoshi and with satoshi to pay upgrades ?
You will need to add lots of ads in order to earn to pay the server/domain/security costs + players earnings + a small profit for you.
And as bitcoin keeps increasing but ad revenue is low i don't think you can handle a flash game from ads only unless you introduce upgrades with money from players pockets = deposits. You will need a personal website, not the faucet, with adsense on it with the version of the game without earning money from it and adsense revenue to help you but for the 2nd website there will be additional costs .
I think you will earn more if you make a (good) tower defense game and try to sell it on google play. After that you might afford to risk a faucet investment with a tower defense game. It is better when you start with good amount of funds but if you try to make a faucet game with tower defense with 0 costs or few bucks it won't work/you can't .
Kindom rush is good, i think there are 3 versions so far (Kingdom rush, kingdom rush frontiers and kingdom rush origins ), to bad after a level later the game becomes very hard and can't win even in easy mode.
The developper of kingdom games (https://www.ironhidegames.com/Games ) has created other games such as kingdom wars, fantasy tower defense, however his style is easy to see it and recognize a game created by him/them ,he has even personal websites for these games. The devellopers earns money from selling the games on google play. ( example : https://play.google.com/store/apps/details?id=com.ironhidegames.android.kingdomrushorigins&hl=en )
and how do you suppose to earn as admin ?
introduce 3 ads to watch between waves ? and by watching ads to earn satoshi and with satoshi to pay upgrades ?
You will need to add lots of ads in order to earn to pay the server/domain/security costs + players earnings + a small profit for you.
And as bitcoin keeps increasing but ad revenue is low i don't think you can handle a flash game from ads only unless you introduce upgrades with money from players pockets = deposits. You will need a personal website, not the faucet, with adsense on it with the version of the game without earning money from it and adsense revenue to help you but for the 2nd website there will be additional costs .
I think you will earn more if you make a (good) tower defense game and try to sell it on google play. After that you might afford to risk a faucet investment with a tower defense game. It is better when you start with good amount of funds but if you try to make a faucet game with tower defense with 0 costs or few bucks it won't work/you can't .
Maybe there are developers selling a tower defense game in flash already finished, ready to run. Another kinds of games I'm sure there are people selling, like arcade games.
The profit would be make like any other faucet/game site, the rewards would be something like what we see now in another sites. Upgrades can make the game more exciting, if possible with VIP, deposit options.
Of course it's more profitable for developers to sell the game, and that is what I mean: The person who buys the game can make a BTC paying site from it.
