The game is fun, but there really needs to either be a consistent way to get stronger, or a lot less RNG when it comes to enemy spawn. Its extremely hard to get anywhere with randomized skills mixed with random spawn rates. I did just invest some coins so maybe I can strike it lucky, but it is pretty hard to play with the limited attacks you have.
Agreed, it's a little frustrating that the only skill for traps (so far that I've seen) is green but you have to be pretty dumb to waste time setting them instead of attacking in her preferred zone. I also always get flooded with blue enemies and that means GG just skip until they finish you off since they can just let all the other enemies hit you from anywhere and you can't do enough damage to get through them all. I've also found out that after to many times of Green hitting an enemy for 20 damage and overkilling when failing to hit full health enemies for more than 10, I just have to turn off the game.