Honestly a fun little game.
Pros:-
I like the replayability due to having levels
The music is great
The Graphics are dark but cute
Cons:-
You can win the game by just leveling up your speed thing. Eventually you can spawn your guys quicker than the bar can deplete. Even if the other guys can kill yours, you have so many attacking it it just cannot get around the problem.
If you spam click the battle and keep doing it during the fight, when the fight finishes, it gives you 2 battle buttons and the title comes up and no lab is available xD
If the Moth had a chance of coming out first, it would forse me to use the moths too, I never used a single one during my playthrough :(
The negatives are tiny things though, just things that will make players think about what they want to do tactically :D Nice little gem you have here, hope it gets further development! <3