Like many others here, I'm a huge Defense Grid fan. It's one of the best and most addicting games ever created and I commend everyone who works on it.
I really like that with your Borderlands release, you created new modes for the original game, like Reverse where the entrance and exit were switched. That was awesome, a lot of fun, and breathed new life into the original game. I'd like to make a suggestion of taking it one step further and creating some new Reverse modes like "Reverse Grinder Mode". There's a lot of maps where I'd love to try Grinder mode in Reverse. Just a suggestion for what it's worth and thank you again for your hard work and dedication.