@jag216: I beat it going towards the middle to get one upgrade, then building down, towards that higher land on the 'south', keeping two blasters at the lower land preventing the creeper to destroy the connection. Then, you build a mortar to basically cap the southwest corner emitter and, there you go, you can start pushing forwards with the blasters, while having some energy. If you prefer, you can build another mortar on the starting isle, so you relieve some of the pressure at the blasters. It took almost 55 minutes for me, but it worked pretty well. Just watch out for the air attacks.
The game was a lot easier than the others, but I have to be honest, I had to spam clicks at the "Do Not ..." sign level.
The level with the ink was the easiest level ever
Managed to get the 10.000 feet moving left achievement. It was pretty easy, I spent lots of money at double jump and jump skills, then started to go up and moving to the left.
The game needs a radar, because jumping to nowhere sucks, I lost because of that... And I was able to enter the shop even in the "sky", with my ship submerged in the core