Yep. The very last iteration before I submitted it, I have upped the solder range and reduced their attack cool down. I considered the game too easy before that, as the skeletons would just snowball really quickly and dominate all the other solders. Doing that, I have made the game to hard XD.
Regarding the lighting. I actually though it was too dark already :D. Lots of details are hard to notice, but I will try.