Collisions were a bit dodgy sometimes. Was alright other than that, nothing too outstanding. Was actually fairly easy, hard badge felt like a medium. 3/5
What Yanti said. If you know what achievements you need to get ahead of time, it's rather easy. As long as you stay alive for 30 seconds right away you should be fine. Changing colors is just typing numbers.
I shed a tear at the ending, nicely done.
PS. To answer some people, yes this is quite like Chronotron but has some key differences that are enough to stand on its own. I think it pulled everything together quite nicely.
Mstrtut has it right. Kills in a row are simply about getting kills quickly, with no breaks in between (around 1/2 to 1 second, I think). Calling multiple waves quickly can help increase this so long as your towers don't get overwhelmed. On swarm waves I've managed to get upwards of 1000 kills in a row, so it's definitely possible.
For everyone wondering about "Size 3 etc", it means you have to beat a random puzzle of that size in the time limit. Click the "?" hexagon on the title screen to play a random board.
@Aries_Lokar: in addition to going back to earlier levels (since each has many modes that unlock as you level), you should definitely put your trust in the traps. For many levels they are necessary, and it's good to get comfortable with using them along with towers. Protip: Green gems work VERY well in traps.
Acornucopia requires that you get all A ranks, that's probably why you didn't get the badge? There are also pawprints that require that.
@Signas: That would not be a problem with the game, but probably would have to do with your browser. Don't rate it low because of something like that.
I'm not a fan of the huge amount of grinding. I haven't run into any bugs yet, but the game does seem off in its balance, certainly not like the others. I also didn't like the abrupt victory/loss screen. In short: balance, bugfix, and polish.
mrhelpful, the opposite colors are arranged according to standard color wheel, but just as a quick guide: red/green, orange/cyan, yellow/blue, lime/purple seem to be the opposites.
@Nioden: The Psychological ability Overdrive causes 10% damage to you per turn. You can't turn it off if you have the ability, so I recommend balancing out the loss with a high level Free Will or Terrify. Corruption will also work if you can use it.
Why Actionscript 2.0? No thanks, I'm gonna use 3.0, and then switch to 4.0 when that comes out. But I do understand it probably would be more complicated for beginners if you had the newer versions instead.