I really liked this! Grew up on Lemmings and I loved this twist. Your bouncer, fire ant, and Spiderman were all really neat sprites, I especially loved the bouncer character. :)
I think you did a great job of making a neat little world and a great framework for a puzzle game. I think with a dozen or two more levels and a few additional special types of ants, and some more polish, this is absolutely something that can be released for a few bucks on something like Steam. Great job!