GeoDefense: Medium Level 2, "Gordy," Is Impossible

It can’t be done. I’ve tried everything. I’ve followed online guides. It’s fricking impossible.

I’ve tried for a YEAR. TO HELL WITH THIS.

Post a solution if you have one. Dammit.

Eh? Building a maze with blaster towers and then eventually missile towers worked just fine for me, as long as I could get them out of the healing area. Just remember upgrading them as you go and it should be fine?