Quite impressive. Borrowing ideas and graphics doesn't matter, those things can be easily replaced and changed. The hard part is to make it all work together in a playable game.
Someone suggested making it into a PDA/mobile game. Another suggestion is to make a browser game of it, ie a game that isn't downloaded and installed but played by visiting a web page and where all data is stored on a remote server and database. Examples of such games are Ogame and Ikariam.org, but they are technically RTS, not TBS. This would require a lot of additional work though (if it's even possible to make a TBS browser game). The money could be in selling subscriptions that provides UI improvements and perhaps some minor in-game bonuses. Perhaps you could also earn some money by selling ad space.