Tower Offense (Rappbit)

The focus of this game is to keep a nice balance between growing your economy and defending your castle.

You can drag the cards located at the bottom of the screen (aka units) near any castle to spawn them. If you spawn them next to your castle (indicated with the usernames) they will cost the amount of gold shown on the card and fight for you.
If you place them next to the enemies' castle, it will only cost you half the amount of gold and provide a nice gold boost once you kill the unit, but they will fight for your enemy and try to defeat you. 

There are also dirt pits on the map, where you can place towers in order to defend your kingdom.

Best of Luck!