I sometimes play this game in other site. The game system here is great. The stars make us no need to count the number of squares all the time. My first time play muti-color, that is hard.
A suggestion for the hard badge: In the first 10 level, try to make every kind/color blocks have 4 in the ring. This will give your joker and blue bomb. Keep your joker and bomb for the last 5 levels.
I win harder at 88 days. There are many farms in my starting view, a laboratory and hospital is nearby too. My strategy is: 1. After got the laboratory and hospital, try to get bar and church first. 2. Don't get the malls and markets, they have 2 blocks. Beside them will make you surround by 1 less zombies block. 3. Use soldiers to kill nearby zombies, but not reclaim area. This can make less zombies around you. 4. Don't expand too many blocks. Try to expand your fort like a square(less zombies blocks beside). 5. If you can get to the corner like a square, you will probably win. 6. Cure the zombie plague is the best way to win, because you can control where to put your laboratory. (When I win the game, I have 46 survivors and +32 food per day. I only have 1 police station. However, the last few wave of zombie horde against my defense is around 1:1, only less than 20% danger to my fort)
I just play mission 6 with COLT M4A1 SOCOM 5.56 got 14 silent kills. Does it need a silent weapon to have silent kllls? I try the same mission again still got many silent kills.
I saw the walkthrough video of Lv 5. Amazing, 3 mushroom pass wave 19. I try the same method and pass the lv 5 too, but the last wave pass my defence :(