Hey, thank you for the comment!
Yeah, I realized that the graphics are too similar a bit too late. I've added some colors to the units, but I'm waiting with the upload until the voting is over. I might think about switching to 2D later on, but for now I'm trying to learn 3D a little bit more. I have an idea for another game, though, which will be 2D.
I wanted to add the tutorial once the game is done, but I guess I'll need to add some help to the development version as well. I'm thinking about creating some sort of "Help" screen until I figure out a decent tutorial.
I've added the random chance late, when I figured out that I won't have enough time to implement multiple creature and knight types as I intended. I felt that, with just one type of knight and two creatures, the combat could use some randomness (I guess I took it a bit too far, though :P). I might remove it later on, for now I'm experimenting with ways to reduce the effects of that random throw (i.e. if the attack misses, the Defense stat of attacked army is lowered, so the next attack will have a much higher chance to hit), we'll see how it goes.
Once again, thanks for the feedback!