neeeeeeds work!
I can only get passed the first level, what the hell? Make it so you can obtain money easier, the fact that it costs money to buy upgrades and ALSO hire units doesn't leave enough for either at the next level, and without the upgrades there's no way in hell to get passed the second level. Rework the difficulty and the money idea, it could work, perhaps make it so it takes EXPERIENCE POINTS to upgrade, and money to hire units. Sound and graphics were okay, basic but ok :)