Play the game for x minutes or die x times are bad achievements. If someone can beat the entire game without dying or completing the game faster than the requirement, why punish them? That player would need to mindlessly die at the end or keep the game open just to get the achievement. At least it's not required for a badge.
I killed 31 invaders in 12 minutes. The easy badge can be gotten after killing the first alien saucer in about 2 minutes, but you don't get it until you die. It has terrible controls and the guy shoots all over the place. Aiming with the mouse would be better. Also some more colors.
The free keys can't even be used anymore since they removed packs that use keys. At least for now. They will probably be brought back a while after the keys expire. Replace them for 120 shards.
I completed the game in 38 minutes and 11 seconds with the help of a walkthrough and 15% of conversations. It's too much trial and error. The guy in the walkthrough got 39% of conversations in 10:53. How is that possible when he obviously only talks when it's necessary?
Imagine spending hundreds of dollars on a Flash game. The whole reason to play Flash games is because they are free. If I wanted to spend money, I'd buy a game, which I have. Every month I get 10 games for $11. $1.10 per game. You can't beat that. Every one of those games is better than Spellstone too.
It took me an hour to beat the game with all stars. I don't know how fast I would be able to get the easy badge if I just used an extra color for levels.
I got this badge on 17 April last year when it was also BOTD. I got it in 7 minutes. One of the hardest, but shortest medium badges. Many medium badges take half an hour or longer, but are easy to get. Rogue Fable III had the hardest and longest medium badge for me. 4 hours and 15 minutes consisting of many replays in order to get far enough to get it.
It turns out that it doesn't take THAT long to get the easy badge after all although it still takes half an hour. That's normally a medium badge. It's long but easy.
Terms of service in a Flash game. I completed 2 battles and it doesn't even count as a single adventure. I'm going to give up on this one. It seems like one of those games where even the easy badge takes like an hour or more. Full of expensive microtransactions too.
I want to shoot with my mouse. Having to turn around constantly and lining up perfectly against zombies is annoying. Most arena shooters shoot towards the cursor and that's much more fun.