Level 16 only works on some computers / operating systems. If you're going to rely on the keypress behaviours, you should implement it in code, not be lazy and rely on the OS. No way to get past it on Mac.
Worse, requires windows + space simultaneously to play (because you did the keymapping wrong in Flash player). That doesn't work on OS X. So ... can't play beyond a few screens in. Rated 1/5
"load game" broken - can't load the final day of challenge, and can't load a completed game. WTF is the point of making us "choose a slot" (stupid idea anyway: this is not a PlayStation1 console, you have no reason for having 3 slots) if we're "not allowed" to load games from them?
Boost at 2350ft to go, and at 2290 ft to go (two steep slopes). The first makes you fast enough that when you hit the second, you soar over the first pile of boxes - saves a HUGE amount of fuel. Make sure you occasionally do NOT do the 2290 boost: you can get a big 1-time bonus for hitting those boxes hard. For the rest, keep the nose UP at all times, try to hit zombies in forehead (saves fuel if you drive over their heads. Yuk). Except when there's a pile of boxes that you cannot get your front wheel over the top of - in that case, keep nose DOWN and plough through them at full speed. When upgrading car, make sure you have 3x the cost of the car in cash total. You lose 1/3 when you buy car, and you need approx 2/3 to upgrade it to approx as good as the fully upgraded previous car.
Warning: 3rd badge is impossible with Mage. You are never "allowed" to buy a weapon powerful enough to inflict 100 damage - even if you take the +30% buff spell. Bad badge design :(
Also: because this game is VERY buggy, always always kill the mages first - otherwise you are highly likely to lose because of bugs, and have to play again. I just had to play the same battle 5 times THAT I HAD ALREADY WON because of one mage and the infinite-health bug.
On the downside, there's a bug that gives enemy mages infinite health. Seriously, this game is WAAAAAAAY too buggy. Sooner or later, the game becomes impossible because of an infinite health enemy. Very sad :(. 2/5
Easy win: play a mage - there's a major bug where halfway through battles, all melee attacks stop working, and only the mage attacks do any damage. Very stupid, but enemy mages are usually weak, so when this happens, your mage destroys the opposition easily. Just takes a few turns.
Step 1: build radio tower. Step 2: enter a valid gmail email address. Step 3: Game crashes. What a P.O.S. lazy coding by developers - can't be bothered to fix bugs? Hmm..
Please PLEASE don't make games where the screen flashes white every 30 seconds! This is NOT "clever" UX, it is NOT good game design, and really doesn't look "cool" or "stylish" - it's just a great way of giving people headaches.
Within literally 10 seconds of starting, I had done everything I was allowed to do. I guess you're supposed to "get addicted to doing nothing, and then pay us lots of money"? Not a good game design. Deserves a 1/5 rating on Kong - we want games that are PLAYABLE, not adverts for Facebook!
After more than 50 restarts, hoping to get a time when it gives me enough yellow notes for the hard badge to EVEN BE POSSIBLE, I'm downrating this. Some games you get less than 90 yellows, sometimes more than 110 - 4 times in 5, it is literally impossible to get the badge, the game just doesn't give you enough multiplier increases for you to get there.
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If you encounter a bug you should completely refresh or it may continue to manifest in the game.