Wow, only just managed to beat MindChamber! Have you considered making all the different health items worth different amounts of health? Eg, brains heal 10, intestined heal 20, guts heal 50 (this will make the vegan achievement mean a little more)
This is one of those games that I couldn't care whether it got badges or not, I'd still come back and play it over and over again. And not many games have that factor about them. The ability to play this game to your own music was the main selling point: Starz in their Eyes and Don't Stop Me Now go wonderfully with this game.
No matter what happens, I cannot play this game for more than five minutes before it frequently stops responding to my input, giving me just one chance each day to get the badge.
I prefer maps that don't require use of airstrike to win. These have the characteristic of your tier 1 village and the enemy's tier 1 village being in cluster bomb range of each other.
Firstly, too many enemies on the field make the game lag. Limit the number of enemies on the field at one time to 20. Secondly, on all backgrounds apart from the blue one, the black slime is hard to see.
Some levels are impossible to rack up enough points on the first chain, and the sharp decrease in burn value makes any further chains practically worthless. Instead of going 5-2-1-0, it ought to go 5-4-3-2-1-0.