The Wars might be Tiny, yet they're still rather challenging!
I managed to win at my first try, and I played the game some more times as well. Each time, the foe's insects cornered me and I barely managed not to let them invade my nest (thanks, bulky beetles <3 ).
When you finally can deploy spiders, at first it seems that you're going to have a smooth win, but then the foe's beetles suddenly slip past them! Rather than calling this a "bug" (surprisingly fitting for this game), I'd call this a feature, since it adds a layer of unexpected difficulty.
Overall the challenge is balanced.
I'd tweak just a couple things:
1) The ants' usefulness lasts too little. It's a better strategy to save resources to build beetles and spiders right after the first 15 seconds of game (or maybe even less).
2) The resource counter being placed in the top left corner forces you to focus your sight there instead of on the field. This can get annoying if you're playing on full-screen mode. I'd suggest placing the resource counter on the bottom center portion of the screen, or maybe beside the spider icon.
I'll give a plus to this game because smashing the enemy's nest with a gajillion spiders in the end is fun! XD