Great game, love the addition of random map peices as an additional tactic. Gold scaling could be a little better, but I guess you just need to play more and invest in the skill tree.
I changed my rating on this game after playing this morning. Having to click through Seven offers all within 2 - 3 mins of opening the game is annoying.
Okay having played this for several days I learn't something important. YOU CANNOT JUST LEAVE. Make sure to save before you log out. My progress has been set back by at least a half a day...this kinda sucks.
TIPS: Best one, take the boss down to single digit HP then finish him off with the handgun for the top reward. Before you try an upgrade or capture, clear out a few of the zombies in the area. On tower def mission, you can spam mines & grenades while holding down the mouse button for maximum destruction, I find cannon & rockets a good comb as well.
Okay I get it, but when you move to challenger it introduces games I have not played before so have no idea of the keys. I don't want to go back a mode and HOPE that game comes up so I know how to play it.
Fighting games rarely work in this format. It's so much worse if you are playing on a laptop. As mentioned by other comments, badge needs to be clearer.