Grenades that land a good 20 ft. away from a soldier can kill said soldier instantly, but rockets hitting enemies dead on can't kill them instantly. Sense. It makes none. Still a good game though.
There was one area, I believe it was the area after you get past the split paths, that was just insane. The only way to beat that level is to have every trap or a ton of grenades or have the minigun never overheat. At the very least I think the mini-gun needs to not overheat so fast.
We should receive more EXP on maps, and a small bit more gold per map. Like ten or fifteen more gold per map and maybe fifty more XP per map, otherwise leveling skills and getting the gold to buy heroes is way too tedious. There should also be a skill that lets us decrease the cost of Magi and Warriors.
I'm glad that you added the ability to sell resources now, but buying stone and crystal still costs way too much. At the very least Stone prices should go down by at least six thousand at the fully upgraded market.
While the slow catapult does the make the game harder, it also makes it TOO hard when you meet lots of the little Goblin thieves or whatever they are. The fact that they cut and run through your soldiers is annoying, and then their attack is pretty strong against your wall. The amount of stone and crystal gained should also be raised. It's almost impossible to get everything you need in the time that you need it because of the stone and crystal costs, this includes buildings and people.
It's a good game, definitly, but it does need to be worked on. Arrows pointing at adjacent battlefields that still have enemies in them, or, if there are no adjacent battlefields with enemies, arrows that point to the closest battlefield with enemies. An enemy count would be great, and maybe a mini-map too.